diff --git a/frontend/delta/js/Clipperz/Crypto/biginteger.js b/frontend/delta/js/Clipperz/Crypto/biginteger.js
new file mode 100644
index 0000000..3f56d18
--- /dev/null
+++ b/frontend/delta/js/Clipperz/Crypto/biginteger.js
@@ -0,0 +1,1620 @@
+/*
+	JavaScript BigInteger library version 0.9.1
+	http://silentmatt.com/biginteger/
+
+	Copyright (c) 2009 Matthew Crumley <email@matthewcrumley.com>
+	Copyright (c) 2010,2011 by John Tobey <John.Tobey@gmail.com>
+	Licensed under the MIT license.
+
+	Support for arbitrary internal representation base was added by
+	Vitaly Magerya.
+*/
+
+/*
+	File: biginteger.js
+
+	Exports:
+
+		<BigInteger>
+*/
+(function(exports) {
+"use strict";
+/*
+	Class: BigInteger
+	An arbitrarily-large integer.
+
+	<BigInteger> objects should be considered immutable. None of the "built-in"
+	methods modify *this* or their arguments. All properties should be
+	considered private.
+
+	All the methods of <BigInteger> instances can be called "statically". The
+	static versions are convenient if you don't already have a <BigInteger>
+	object.
+
+	As an example, these calls are equivalent.
+
+	> BigInteger(4).multiply(5); // returns BigInteger(20);
+	> BigInteger.multiply(4, 5); // returns BigInteger(20);
+
+	> var a = 42;
+	> var a = BigInteger.toJSValue("0b101010"); // Not completely useless...
+*/
+
+var CONSTRUCT = {}; // Unique token to call "private" version of constructor
+
+/*
+	Constructor: BigInteger()
+	Convert a value to a <BigInteger>.
+
+	Although <BigInteger()> is the constructor for <BigInteger> objects, it is
+	best not to call it as a constructor. If *n* is a <BigInteger> object, it is
+	simply returned as-is. Otherwise, <BigInteger()> is equivalent to <parse>
+	without a radix argument.
+
+	> var n0 = BigInteger();      // Same as <BigInteger.ZERO>
+	> var n1 = BigInteger("123"); // Create a new <BigInteger> with value 123
+	> var n2 = BigInteger(123);   // Create a new <BigInteger> with value 123
+	> var n3 = BigInteger(n2);    // Return n2, unchanged
+
+	The constructor form only takes an array and a sign. *n* must be an
+	array of numbers in little-endian order, where each digit is between 0
+	and BigInteger.base.  The second parameter sets the sign: -1 for
+	negative, +1 for positive, or 0 for zero. The array is *not copied and
+	may be modified*. If the array contains only zeros, the sign parameter
+	is ignored and is forced to zero.
+
+	> new BigInteger([5], -1): create a new BigInteger with value -5
+
+	Parameters:
+
+		n - Value to convert to a <BigInteger>.
+
+	Returns:
+
+		A <BigInteger> value.
+
+	See Also:
+
+		<parse>, <BigInteger>
+*/
+function BigInteger(n, s, token) {
+	if (token !== CONSTRUCT) {
+		if (n instanceof BigInteger) {
+			return n;
+		}
+		else if (typeof n === "undefined") {
+			return ZERO;
+		}
+		return BigInteger.parse(n);
+	}
+
+	n = n || [];  // Provide the nullary constructor for subclasses.
+	while (n.length && !n[n.length - 1]) {
+		--n.length;
+	}
+	this._d = n;
+	this._s = n.length ? (s || 1) : 0;
+}
+
+BigInteger._construct = function(n, s) {
+	return new BigInteger(n, s, CONSTRUCT);
+};
+
+// Base-10 speedup hacks in parse, toString, exp10 and log functions
+// require base to be a power of 10. 10^7 is the largest such power
+// that won't cause a precision loss when digits are multiplied.
+var BigInteger_base = 10000000;
+var BigInteger_base_log10 = 7;
+
+BigInteger.base = BigInteger_base;
+BigInteger.base_log10 = BigInteger_base_log10;
+
+var ZERO = new BigInteger([], 0, CONSTRUCT);
+// Constant: ZERO
+// <BigInteger> 0.
+BigInteger.ZERO = ZERO;
+
+var ONE = new BigInteger([1], 1, CONSTRUCT);
+// Constant: ONE
+// <BigInteger> 1.
+BigInteger.ONE = ONE;
+
+var M_ONE = new BigInteger(ONE._d, -1, CONSTRUCT);
+// Constant: M_ONE
+// <BigInteger> -1.
+BigInteger.M_ONE = M_ONE;
+
+// Constant: _0
+// Shortcut for <ZERO>.
+BigInteger._0 = ZERO;
+
+// Constant: _1
+// Shortcut for <ONE>.
+BigInteger._1 = ONE;
+
+/*
+	Constant: small
+	Array of <BigIntegers> from 0 to 36.
+
+	These are used internally for parsing, but useful when you need a "small"
+	<BigInteger>.
+
+	See Also:
+
+		<ZERO>, <ONE>, <_0>, <_1>
+*/
+BigInteger.small = [
+	ZERO,
+	ONE,
+	/* Assuming BigInteger_base > 36 */
+	new BigInteger( [2], 1, CONSTRUCT),
+	new BigInteger( [3], 1, CONSTRUCT),
+	new BigInteger( [4], 1, CONSTRUCT),
+	new BigInteger( [5], 1, CONSTRUCT),
+	new BigInteger( [6], 1, CONSTRUCT),
+	new BigInteger( [7], 1, CONSTRUCT),
+	new BigInteger( [8], 1, CONSTRUCT),
+	new BigInteger( [9], 1, CONSTRUCT),
+	new BigInteger([10], 1, CONSTRUCT),
+	new BigInteger([11], 1, CONSTRUCT),
+	new BigInteger([12], 1, CONSTRUCT),
+	new BigInteger([13], 1, CONSTRUCT),
+	new BigInteger([14], 1, CONSTRUCT),
+	new BigInteger([15], 1, CONSTRUCT),
+	new BigInteger([16], 1, CONSTRUCT),
+	new BigInteger([17], 1, CONSTRUCT),
+	new BigInteger([18], 1, CONSTRUCT),
+	new BigInteger([19], 1, CONSTRUCT),
+	new BigInteger([20], 1, CONSTRUCT),
+	new BigInteger([21], 1, CONSTRUCT),
+	new BigInteger([22], 1, CONSTRUCT),
+	new BigInteger([23], 1, CONSTRUCT),
+	new BigInteger([24], 1, CONSTRUCT),
+	new BigInteger([25], 1, CONSTRUCT),
+	new BigInteger([26], 1, CONSTRUCT),
+	new BigInteger([27], 1, CONSTRUCT),
+	new BigInteger([28], 1, CONSTRUCT),
+	new BigInteger([29], 1, CONSTRUCT),
+	new BigInteger([30], 1, CONSTRUCT),
+	new BigInteger([31], 1, CONSTRUCT),
+	new BigInteger([32], 1, CONSTRUCT),
+	new BigInteger([33], 1, CONSTRUCT),
+	new BigInteger([34], 1, CONSTRUCT),
+	new BigInteger([35], 1, CONSTRUCT),
+	new BigInteger([36], 1, CONSTRUCT)
+];
+
+// Used for parsing/radix conversion
+BigInteger.digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ".split("");
+
+/*
+	Method: toString
+	Convert a <BigInteger> to a string.
+
+	When *base* is greater than 10, letters are upper case.
+
+	Parameters:
+
+		base - Optional base to represent the number in (default is base 10).
+		       Must be between 2 and 36 inclusive, or an Error will be thrown.
+
+	Returns:
+
+		The string representation of the <BigInteger>.
+*/
+BigInteger.prototype.toString = function(base) {
+	base = +base || 10;
+	if (base < 2 || base > 36) {
+		throw new Error("illegal radix " + base + ".");
+	}
+	if (this._s === 0) {
+		return "0";
+	}
+	if (base === 10) {
+		var str = this._s < 0 ? "-" : "";
+		str += this._d[this._d.length - 1].toString();
+		for (var i = this._d.length - 2; i >= 0; i--) {
+			var group = this._d[i].toString();
+			while (group.length < BigInteger_base_log10) group = '0' + group;
+			str += group;
+		}
+		return str;
+	}
+	else {
+		var numerals = BigInteger.digits;
+		base = BigInteger.small[base];
+		var sign = this._s;
+
+		var n = this.abs();
+		var digits = [];
+		var digit;
+
+		while (n._s !== 0) {
+			var divmod = n.divRem(base);
+			n = divmod[0];
+			digit = divmod[1];
+			// TODO: This could be changed to unshift instead of reversing at the end.
+			// Benchmark both to compare speeds.
+			digits.push(numerals[digit.valueOf()]);
+		}
+		return (sign < 0 ? "-" : "") + digits.reverse().join("");
+	}
+};
+
+// Verify strings for parsing
+BigInteger.radixRegex = [
+	/^$/,
+	/^$/,
+	/^[01]*$/,
+	/^[012]*$/,
+	/^[0-3]*$/,
+	/^[0-4]*$/,
+	/^[0-5]*$/,
+	/^[0-6]*$/,
+	/^[0-7]*$/,
+	/^[0-8]*$/,
+	/^[0-9]*$/,
+	/^[0-9aA]*$/,
+	/^[0-9abAB]*$/,
+	/^[0-9abcABC]*$/,
+	/^[0-9a-dA-D]*$/,
+	/^[0-9a-eA-E]*$/,
+	/^[0-9a-fA-F]*$/,
+	/^[0-9a-gA-G]*$/,
+	/^[0-9a-hA-H]*$/,
+	/^[0-9a-iA-I]*$/,
+	/^[0-9a-jA-J]*$/,
+	/^[0-9a-kA-K]*$/,
+	/^[0-9a-lA-L]*$/,
+	/^[0-9a-mA-M]*$/,
+	/^[0-9a-nA-N]*$/,
+	/^[0-9a-oA-O]*$/,
+	/^[0-9a-pA-P]*$/,
+	/^[0-9a-qA-Q]*$/,
+	/^[0-9a-rA-R]*$/,
+	/^[0-9a-sA-S]*$/,
+	/^[0-9a-tA-T]*$/,
+	/^[0-9a-uA-U]*$/,
+	/^[0-9a-vA-V]*$/,
+	/^[0-9a-wA-W]*$/,
+	/^[0-9a-xA-X]*$/,
+	/^[0-9a-yA-Y]*$/,
+	/^[0-9a-zA-Z]*$/
+];
+
+/*
+	Function: parse
+	Parse a string into a <BigInteger>.
+
+	*base* is optional but, if provided, must be from 2 to 36 inclusive. If
+	*base* is not provided, it will be guessed based on the leading characters
+	of *s* as follows:
+
+	- "0x" or "0X": *base* = 16
+	- "0c" or "0C": *base* = 8
+	- "0b" or "0B": *base* = 2
+	- else: *base* = 10
+
+	If no base is provided, or *base* is 10, the number can be in exponential
+	form. For example, these are all valid:
+
+	> BigInteger.parse("1e9");              // Same as "1000000000"
+	> BigInteger.parse("1.234*10^3");       // Same as 1234
+	> BigInteger.parse("56789 * 10 ** -2"); // Same as 567
+
+	If any characters fall outside the range defined by the radix, an exception
+	will be thrown.
+
+	Parameters:
+
+		s - The string to parse.
+		base - Optional radix (default is to guess based on *s*).
+
+	Returns:
+
+		a <BigInteger> instance.
+*/
+BigInteger.parse = function(s, base) {
+	// Expands a number in exponential form to decimal form.
+	// expandExponential("-13.441*10^5") === "1344100";
+	// expandExponential("1.12300e-1") === "0.112300";
+	// expandExponential(1000000000000000000000000000000) === "1000000000000000000000000000000";
+	function expandExponential(str) {
+		str = str.replace(/\s*[*xX]\s*10\s*(\^|\*\*)\s*/, "e");
+
+		return str.replace(/^([+\-])?(\d+)\.?(\d*)[eE]([+\-]?\d+)$/, function(x, s, n, f, c) {
+			c = +c;
+			var l = c < 0;
+			var i = n.length + c;
+			x = (l ? n : f).length;
+			c = ((c = Math.abs(c)) >= x ? c - x + l : 0);
+			var z = (new Array(c + 1)).join("0");
+			var r = n + f;
+			return (s || "") + (l ? r = z + r : r += z).substr(0, i += l ? z.length : 0) + (i < r.length ? "." + r.substr(i) : "");
+		});
+	}
+
+	s = s.toString();
+	if (typeof base === "undefined" || +base === 10) {
+		s = expandExponential(s);
+	}
+
+	var prefixRE;
+	if (typeof base === "undefined") {
+		prefixRE = '0[xcb]';
+	}
+	else if (base == 16) {
+		prefixRE = '0x';
+	}
+	else if (base == 8) {
+		prefixRE = '0c';
+	}
+	else if (base == 2) {
+		prefixRE = '0b';
+	}
+	else {
+		prefixRE = '';
+	}
+	var parts = new RegExp('^([+\\-]?)(' + prefixRE + ')?([0-9a-z]*)(?:\\.\\d*)?$', 'i').exec(s);
+	if (parts) {
+		var sign = parts[1] || "+";
+		var baseSection = parts[2] || "";
+		var digits = parts[3] || "";
+
+		if (typeof base === "undefined") {
+			// Guess base
+			if (baseSection === "0x" || baseSection === "0X") { // Hex
+				base = 16;
+			}
+			else if (baseSection === "0c" || baseSection === "0C") { // Octal
+				base = 8;
+			}
+			else if (baseSection === "0b" || baseSection === "0B") { // Binary
+				base = 2;
+			}
+			else {
+				base = 10;
+			}
+		}
+		else if (base < 2 || base > 36) {
+			throw new Error("Illegal radix " + base + ".");
+		}
+
+		base = +base;
+
+		// Check for digits outside the range
+		if (!(BigInteger.radixRegex[base].test(digits))) {
+			throw new Error("Bad digit for radix " + base);
+		}
+
+		// Strip leading zeros, and convert to array
+		digits = digits.replace(/^0+/, "").split("");
+		if (digits.length === 0) {
+			return ZERO;
+		}
+
+		// Get the sign (we know it's not zero)
+		sign = (sign === "-") ? -1 : 1;
+
+		// Optimize 10
+		if (base == 10) {
+			var d = [];
+			while (digits.length >= BigInteger_base_log10) {
+				d.push(parseInt(digits.splice(digits.length-BigInteger.base_log10, BigInteger.base_log10).join(''), 10));
+			}
+			d.push(parseInt(digits.join(''), 10));
+			return new BigInteger(d, sign, CONSTRUCT);
+		}
+
+		// Do the conversion
+		var d = ZERO;
+		base = BigInteger.small[base];
+		var small = BigInteger.small;
+		for (var i = 0; i < digits.length; i++) {
+			d = d.multiply(base).add(small[parseInt(digits[i], 36)]);
+		}
+		return new BigInteger(d._d, sign, CONSTRUCT);
+	}
+	else {
+		throw new Error("Invalid BigInteger format: " + s);
+	}
+};
+
+/*
+	Function: add
+	Add two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to add to *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		The numbers added together.
+
+	See Also:
+
+		<subtract>, <multiply>, <quotient>, <next>
+*/
+BigInteger.prototype.add = function(n) {
+	if (this._s === 0) {
+		return BigInteger(n);
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return this;
+	}
+	if (this._s !== n._s) {
+		n = n.negate();
+		return this.subtract(n);
+	}
+
+	var a = this._d;
+	var b = n._d;
+	var al = a.length;
+	var bl = b.length;
+	var sum = new Array(Math.max(al, bl) + 1);
+	var size = Math.min(al, bl);
+	var carry = 0;
+	var digit;
+
+	for (var i = 0; i < size; i++) {
+		digit = a[i] + b[i] + carry;
+		sum[i] = digit % BigInteger_base;
+		carry = (digit / BigInteger_base) | 0;
+	}
+	if (bl > al) {
+		a = b;
+		al = bl;
+	}
+	for (i = size; carry && i < al; i++) {
+		digit = a[i] + carry;
+		sum[i] = digit % BigInteger_base;
+		carry = (digit / BigInteger_base) | 0;
+	}
+	if (carry) {
+		sum[i] = carry;
+	}
+
+	for ( ; i < al; i++) {
+		sum[i] = a[i];
+	}
+
+	return new BigInteger(sum, this._s, CONSTRUCT);
+};
+
+/*
+	Function: negate
+	Get the additive inverse of a <BigInteger>.
+
+	Returns:
+
+		A <BigInteger> with the same magnatude, but with the opposite sign.
+
+	See Also:
+
+		<abs>
+*/
+BigInteger.prototype.negate = function() {
+	return new BigInteger(this._d, (-this._s) | 0, CONSTRUCT);
+};
+
+/*
+	Function: abs
+	Get the absolute value of a <BigInteger>.
+
+	Returns:
+
+		A <BigInteger> with the same magnatude, but always positive (or zero).
+
+	See Also:
+
+		<negate>
+*/
+BigInteger.prototype.abs = function() {
+	return (this._s < 0) ? this.negate() : this;
+};
+
+/*
+	Function: subtract
+	Subtract two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to subtract from *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		The *n* subtracted from *this*.
+
+	See Also:
+
+		<add>, <multiply>, <quotient>, <prev>
+*/
+BigInteger.prototype.subtract = function(n) {
+	if (this._s === 0) {
+		return BigInteger(n).negate();
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return this;
+	}
+	if (this._s !== n._s) {
+		n = n.negate();
+		return this.add(n);
+	}
+
+	var m = this;
+	// negative - negative => -|a| - -|b| => -|a| + |b| => |b| - |a|
+	if (this._s < 0) {
+		m = new BigInteger(n._d, 1, CONSTRUCT);
+		n = new BigInteger(this._d, 1, CONSTRUCT);
+	}
+
+	// Both are positive => a - b
+	var sign = m.compareAbs(n);
+	if (sign === 0) {
+		return ZERO;
+	}
+	else if (sign < 0) {
+		// swap m and n
+		var t = n;
+		n = m;
+		m = t;
+	}
+
+	// a > b
+	var a = m._d;
+	var b = n._d;
+	var al = a.length;
+	var bl = b.length;
+	var diff = new Array(al); // al >= bl since a > b
+	var borrow = 0;
+	var i;
+	var digit;
+
+	for (i = 0; i < bl; i++) {
+		digit = a[i] - borrow - b[i];
+		if (digit < 0) {
+			digit += BigInteger_base;
+			borrow = 1;
+		}
+		else {
+			borrow = 0;
+		}
+		diff[i] = digit;
+	}
+	for (i = bl; i < al; i++) {
+		digit = a[i] - borrow;
+		if (digit < 0) {
+			digit += BigInteger_base;
+		}
+		else {
+			diff[i++] = digit;
+			break;
+		}
+		diff[i] = digit;
+	}
+	for ( ; i < al; i++) {
+		diff[i] = a[i];
+	}
+
+	return new BigInteger(diff, sign, CONSTRUCT);
+};
+
+(function() {
+	function addOne(n, sign) {
+		var a = n._d;
+		var sum = a.slice();
+		var carry = true;
+		var i = 0;
+
+		while (true) {
+			var digit = (a[i] || 0) + 1;
+			sum[i] = digit % BigInteger_base;
+			if (digit <= BigInteger_base - 1) {
+				break;
+			}
+			++i;
+		}
+
+		return new BigInteger(sum, sign, CONSTRUCT);
+	}
+
+	function subtractOne(n, sign) {
+		var a = n._d;
+		var sum = a.slice();
+		var borrow = true;
+		var i = 0;
+
+		while (true) {
+			var digit = (a[i] || 0) - 1;
+			if (digit < 0) {
+				sum[i] = digit + BigInteger_base;
+			}
+			else {
+				sum[i] = digit;
+				break;
+			}
+			++i;
+		}
+
+		return new BigInteger(sum, sign, CONSTRUCT);
+	}
+
+	/*
+		Function: next
+		Get the next <BigInteger> (add one).
+
+		Returns:
+
+			*this* + 1.
+
+		See Also:
+
+			<add>, <prev>
+	*/
+	BigInteger.prototype.next = function() {
+		switch (this._s) {
+		case 0:
+			return ONE;
+		case -1:
+			return subtractOne(this, -1);
+		// case 1:
+		default:
+			return addOne(this, 1);
+		}
+	};
+
+	/*
+		Function: prev
+		Get the previous <BigInteger> (subtract one).
+
+		Returns:
+
+			*this* - 1.
+
+		See Also:
+
+			<next>, <subtract>
+	*/
+	BigInteger.prototype.prev = function() {
+		switch (this._s) {
+		case 0:
+			return M_ONE;
+		case -1:
+			return addOne(this, -1);
+		// case 1:
+		default:
+			return subtractOne(this, 1);
+		}
+	};
+})();
+
+/*
+	Function: compareAbs
+	Compare the absolute value of two <BigIntegers>.
+
+	Calling <compareAbs> is faster than calling <abs> twice, then <compare>.
+
+	Parameters:
+
+		n - The number to compare to *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		-1, 0, or +1 if *|this|* is less than, equal to, or greater than *|n|*.
+
+	See Also:
+
+		<compare>, <abs>
+*/
+BigInteger.prototype.compareAbs = function(n) {
+	if (this === n) {
+		return 0;
+	}
+
+	if (!(n instanceof BigInteger)) {
+		if (!isFinite(n)) {
+			return(isNaN(n) ? n : -1);
+		}
+		n = BigInteger(n);
+	}
+
+	if (this._s === 0) {
+		return (n._s !== 0) ? -1 : 0;
+	}
+	if (n._s === 0) {
+		return 1;
+	}
+
+	var l = this._d.length;
+	var nl = n._d.length;
+	if (l < nl) {
+		return -1;
+	}
+	else if (l > nl) {
+		return 1;
+	}
+
+	var a = this._d;
+	var b = n._d;
+	for (var i = l-1; i >= 0; i--) {
+		if (a[i] !== b[i]) {
+			return a[i] < b[i] ? -1 : 1;
+		}
+	}
+
+	return 0;
+};
+
+/*
+	Function: compare
+	Compare two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to compare to *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		-1, 0, or +1 if *this* is less than, equal to, or greater than *n*.
+
+	See Also:
+
+		<compareAbs>, <isPositive>, <isNegative>, <isUnit>
+*/
+BigInteger.prototype.compare = function(n) {
+	if (this === n) {
+		return 0;
+	}
+
+	n = BigInteger(n);
+
+	if (this._s === 0) {
+		return -n._s;
+	}
+
+	if (this._s === n._s) { // both positive or both negative
+		var cmp = this.compareAbs(n);
+		return cmp * this._s;
+	}
+	else {
+		return this._s;
+	}
+};
+
+/*
+	Function: isUnit
+	Return true iff *this* is either 1 or -1.
+
+	Returns:
+
+		true if *this* compares equal to <BigInteger.ONE> or <BigInteger.M_ONE>.
+
+	See Also:
+
+		<isZero>, <isNegative>, <isPositive>, <compareAbs>, <compare>,
+		<BigInteger.ONE>, <BigInteger.M_ONE>
+*/
+BigInteger.prototype.isUnit = function() {
+	return this === ONE ||
+		this === M_ONE ||
+		(this._d.length === 1 && this._d[0] === 1);
+};
+
+/*
+	Function: multiply
+	Multiply two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to multiply *this* by. Will be converted to a
+		<BigInteger>.
+
+	Returns:
+
+		The numbers multiplied together.
+
+	See Also:
+
+		<add>, <subtract>, <quotient>, <square>
+*/
+BigInteger.prototype.multiply = function(n) {
+	// TODO: Consider adding Karatsuba multiplication for large numbers
+	if (this._s === 0) {
+		return ZERO;
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return ZERO;
+	}
+	if (this.isUnit()) {
+		if (this._s < 0) {
+			return n.negate();
+		}
+		return n;
+	}
+	if (n.isUnit()) {
+		if (n._s < 0) {
+			return this.negate();
+		}
+		return this;
+	}
+	if (this === n) {
+		return this.square();
+	}
+
+	var r = (this._d.length >= n._d.length);
+	var a = (r ? this : n)._d; // a will be longer than b
+	var b = (r ? n : this)._d;
+	var al = a.length;
+	var bl = b.length;
+
+	var pl = al + bl;
+	var partial = new Array(pl);
+	var i;
+	for (i = 0; i < pl; i++) {
+		partial[i] = 0;
+	}
+
+	for (i = 0; i < bl; i++) {
+		var carry = 0;
+		var bi = b[i];
+		var jlimit = al + i;
+		var digit;
+		for (var j = i; j < jlimit; j++) {
+			digit = partial[j] + bi * a[j - i] + carry;
+			carry = (digit / BigInteger_base) | 0;
+			partial[j] = (digit % BigInteger_base) | 0;
+		}
+		if (carry) {
+			digit = partial[j] + carry;
+			carry = (digit / BigInteger_base) | 0;
+			partial[j] = digit % BigInteger_base;
+		}
+	}
+	return new BigInteger(partial, this._s * n._s, CONSTRUCT);
+};
+
+// Multiply a BigInteger by a single-digit native number
+// Assumes that this and n are >= 0
+// This is not really intended to be used outside the library itself
+BigInteger.prototype.multiplySingleDigit = function(n) {
+	if (n === 0 || this._s === 0) {
+		return ZERO;
+	}
+	if (n === 1) {
+		return this;
+	}
+
+	var digit;
+	if (this._d.length === 1) {
+		digit = this._d[0] * n;
+		if (digit >= BigInteger_base) {
+			return new BigInteger([(digit % BigInteger_base)|0,
+					(digit / BigInteger_base)|0], 1, CONSTRUCT);
+		}
+		return new BigInteger([digit], 1, CONSTRUCT);
+	}
+
+	if (n === 2) {
+		return this.add(this);
+	}
+	if (this.isUnit()) {
+		return new BigInteger([n], 1, CONSTRUCT);
+	}
+
+	var a = this._d;
+	var al = a.length;
+
+	var pl = al + 1;
+	var partial = new Array(pl);
+	for (var i = 0; i < pl; i++) {
+		partial[i] = 0;
+	}
+
+	var carry = 0;
+	for (var j = 0; j < al; j++) {
+		digit = n * a[j] + carry;
+		carry = (digit / BigInteger_base) | 0;
+		partial[j] = (digit % BigInteger_base) | 0;
+	}
+	if (carry) {
+		partial[j] = carry;
+	}
+
+	return new BigInteger(partial, 1, CONSTRUCT);
+};
+
+/*
+	Function: square
+	Multiply a <BigInteger> by itself.
+
+	This is slightly faster than regular multiplication, since it removes the
+	duplicated multiplcations.
+
+	Returns:
+
+		> this.multiply(this)
+
+	See Also:
+		<multiply>
+*/
+BigInteger.prototype.square = function() {
+	// Normally, squaring a 10-digit number would take 100 multiplications.
+	// Of these 10 are unique diagonals, of the remaining 90 (100-10), 45 are repeated.
+	// This procedure saves (N*(N-1))/2 multiplications, (e.g., 45 of 100 multiplies).
+	// Based on code by Gary Darby, Intellitech Systems Inc., www.DelphiForFun.org
+
+	if (this._s === 0) {
+		return ZERO;
+	}
+	if (this.isUnit()) {
+		return ONE;
+	}
+
+	var digits = this._d;
+	var length = digits.length;
+	var imult1 = new Array(length + length + 1);
+	var product, carry, k;
+	var i;
+
+	// Calculate diagonal
+	for (i = 0; i < length; i++) {
+		k = i * 2;
+		product = digits[i] * digits[i];
+		carry = (product / BigInteger_base) | 0;
+		imult1[k] = product % BigInteger_base;
+		imult1[k + 1] = carry;
+	}
+
+	// Calculate repeating part
+	for (i = 0; i < length; i++) {
+		carry = 0;
+		k = i * 2 + 1;
+		for (var j = i + 1; j < length; j++, k++) {
+			product = digits[j] * digits[i] * 2 + imult1[k] + carry;
+			carry = (product / BigInteger_base) | 0;
+			imult1[k] = product % BigInteger_base;
+		}
+		k = length + i;
+		var digit = carry + imult1[k];
+		carry = (digit / BigInteger_base) | 0;
+		imult1[k] = digit % BigInteger_base;
+		imult1[k + 1] += carry;
+	}
+
+	return new BigInteger(imult1, 1, CONSTRUCT);
+};
+
+/*
+	Function: quotient
+	Divide two <BigIntegers> and truncate towards zero.
+
+	<quotient> throws an exception if *n* is zero.
+
+	Parameters:
+
+		n - The number to divide *this* by. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		The *this* / *n*, truncated to an integer.
+
+	See Also:
+
+		<add>, <subtract>, <multiply>, <divRem>, <remainder>
+*/
+BigInteger.prototype.quotient = function(n) {
+	return this.divRem(n)[0];
+};
+
+/*
+	Function: divide
+	Deprecated synonym for <quotient>.
+*/
+BigInteger.prototype.divide = BigInteger.prototype.quotient;
+
+/*
+	Function: remainder
+	Calculate the remainder of two <BigIntegers>.
+
+	<remainder> throws an exception if *n* is zero.
+
+	Parameters:
+
+		n - The remainder after *this* is divided *this* by *n*. Will be
+		    converted to a <BigInteger>.
+
+	Returns:
+
+		*this* % *n*.
+
+	See Also:
+
+		<divRem>, <quotient>
+*/
+BigInteger.prototype.remainder = function(n) {
+	return this.divRem(n)[1];
+};
+
+/*
+	Function: divRem
+	Calculate the integer quotient and remainder of two <BigIntegers>.
+
+	<divRem> throws an exception if *n* is zero.
+
+	Parameters:
+
+		n - The number to divide *this* by. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		A two-element array containing the quotient and the remainder.
+
+		> a.divRem(b)
+
+		is exactly equivalent to
+
+		> [a.quotient(b), a.remainder(b)]
+
+		except it is faster, because they are calculated at the same time.
+
+	See Also:
+
+		<quotient>, <remainder>
+*/
+BigInteger.prototype.divRem = function(n) {
+	n = BigInteger(n);
+	if (n._s === 0) {
+		throw new Error("Divide by zero");
+	}
+	if (this._s === 0) {
+		return [ZERO, ZERO];
+	}
+	if (n._d.length === 1) {
+		return this.divRemSmall(n._s * n._d[0]);
+	}
+
+	// Test for easy cases -- |n1| <= |n2|
+	switch (this.compareAbs(n)) {
+	case 0: // n1 == n2
+		return [this._s === n._s ? ONE : M_ONE, ZERO];
+	case -1: // |n1| < |n2|
+		return [ZERO, this];
+	}
+
+	var sign = this._s * n._s;
+	var a = n.abs();
+	var b_digits = this._d;
+	var b_index = b_digits.length;
+	var digits = n._d.length;
+	var quot = [];
+	var guess;
+
+	var part = new BigInteger([], 0, CONSTRUCT);
+
+	while (b_index) {
+		part._d.unshift(b_digits[--b_index]);
+		part = new BigInteger(part._d, 1, CONSTRUCT);
+
+		if (part.compareAbs(n) < 0) {
+			quot.push(0);
+			continue;
+		}
+		if (part._s === 0) {
+			guess = 0;
+		}
+		else {
+			var xlen = part._d.length, ylen = a._d.length;
+			var highx = part._d[xlen-1]*BigInteger_base + part._d[xlen-2];
+			var highy = a._d[ylen-1]*BigInteger_base + a._d[ylen-2];
+			if (part._d.length > a._d.length) {
+				// The length of part._d can either match a._d length,
+				// or exceed it by one.
+				highx = (highx+1)*BigInteger_base;
+			}
+			guess = Math.ceil(highx/highy);
+		}
+		do {
+			var check = a.multiplySingleDigit(guess);
+			if (check.compareAbs(part) <= 0) {
+				break;
+			}
+			guess--;
+		} while (guess);
+
+		quot.push(guess);
+		if (!guess) {
+			continue;
+		}
+		var diff = part.subtract(check);
+		part._d = diff._d.slice();
+	}
+
+	return [new BigInteger(quot.reverse(), sign, CONSTRUCT),
+		   new BigInteger(part._d, this._s, CONSTRUCT)];
+};
+
+// Throws an exception if n is outside of (-BigInteger.base, -1] or
+// [1, BigInteger.base).  It's not necessary to call this, since the
+// other division functions will call it if they are able to.
+BigInteger.prototype.divRemSmall = function(n) {
+	var r;
+	n = +n;
+	if (n === 0) {
+		throw new Error("Divide by zero");
+	}
+
+	var n_s = n < 0 ? -1 : 1;
+	var sign = this._s * n_s;
+	n = Math.abs(n);
+
+	if (n < 1 || n >= BigInteger_base) {
+		throw new Error("Argument out of range");
+	}
+
+	if (this._s === 0) {
+		return [ZERO, ZERO];
+	}
+
+	if (n === 1 || n === -1) {
+		return [(sign === 1) ? this.abs() : new BigInteger(this._d, sign, CONSTRUCT), ZERO];
+	}
+
+	// 2 <= n < BigInteger_base
+
+	// divide a single digit by a single digit
+	if (this._d.length === 1) {
+		var q = new BigInteger([(this._d[0] / n) | 0], 1, CONSTRUCT);
+		r = new BigInteger([(this._d[0] % n) | 0], 1, CONSTRUCT);
+		if (sign < 0) {
+			q = q.negate();
+		}
+		if (this._s < 0) {
+			r = r.negate();
+		}
+		return [q, r];
+	}
+
+	var digits = this._d.slice();
+	var quot = new Array(digits.length);
+	var part = 0;
+	var diff = 0;
+	var i = 0;
+	var guess;
+
+	while (digits.length) {
+		part = part * BigInteger_base + digits[digits.length - 1];
+		if (part < n) {
+			quot[i++] = 0;
+			digits.pop();
+			diff = BigInteger_base * diff + part;
+			continue;
+		}
+		if (part === 0) {
+			guess = 0;
+		}
+		else {
+			guess = (part / n) | 0;
+		}
+
+		var check = n * guess;
+		diff = part - check;
+		quot[i++] = guess;
+		if (!guess) {
+			digits.pop();
+			continue;
+		}
+
+		digits.pop();
+		part = diff;
+	}
+
+	r = new BigInteger([diff], 1, CONSTRUCT);
+	if (this._s < 0) {
+		r = r.negate();
+	}
+	return [new BigInteger(quot.reverse(), sign, CONSTRUCT), r];
+};
+
+/*
+	Function: isEven
+	Return true iff *this* is divisible by two.
+
+	Note that <BigInteger.ZERO> is even.
+
+	Returns:
+
+		true if *this* is even, false otherwise.
+
+	See Also:
+
+		<isOdd>
+*/
+BigInteger.prototype.isEven = function() {
+	var digits = this._d;
+	return this._s === 0 || digits.length === 0 || (digits[0] % 2) === 0;
+};
+
+/*
+	Function: isOdd
+	Return true iff *this* is not divisible by two.
+
+	Returns:
+
+		true if *this* is odd, false otherwise.
+
+	See Also:
+
+		<isEven>
+*/
+BigInteger.prototype.isOdd = function() {
+	return !this.isEven();
+};
+
+/*
+	Function: sign
+	Get the sign of a <BigInteger>.
+
+	Returns:
+
+		* -1 if *this* < 0
+		* 0 if *this* == 0
+		* +1 if *this* > 0
+
+	See Also:
+
+		<isZero>, <isPositive>, <isNegative>, <compare>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.sign = function() {
+	return this._s;
+};
+
+/*
+	Function: isPositive
+	Return true iff *this* > 0.
+
+	Returns:
+
+		true if *this*.compare(<BigInteger.ZERO>) == 1.
+
+	See Also:
+
+		<sign>, <isZero>, <isNegative>, <isUnit>, <compare>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.isPositive = function() {
+	return this._s > 0;
+};
+
+/*
+	Function: isNegative
+	Return true iff *this* < 0.
+
+	Returns:
+
+		true if *this*.compare(<BigInteger.ZERO>) == -1.
+
+	See Also:
+
+		<sign>, <isPositive>, <isZero>, <isUnit>, <compare>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.isNegative = function() {
+	return this._s < 0;
+};
+
+/*
+	Function: isZero
+	Return true iff *this* == 0.
+
+	Returns:
+
+		true if *this*.compare(<BigInteger.ZERO>) == 0.
+
+	See Also:
+
+		<sign>, <isPositive>, <isNegative>, <isUnit>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.isZero = function() {
+	return this._s === 0;
+};
+
+/*
+	Function: exp10
+	Multiply a <BigInteger> by a power of 10.
+
+	This is equivalent to, but faster than
+
+	> if (n >= 0) {
+	>     return this.multiply(BigInteger("1e" + n));
+	> }
+	> else { // n <= 0
+	>     return this.quotient(BigInteger("1e" + -n));
+	> }
+
+	Parameters:
+
+		n - The power of 10 to multiply *this* by. *n* is converted to a
+		javascipt number and must be no greater than <BigInteger.MAX_EXP>
+		(0x7FFFFFFF), or an exception will be thrown.
+
+	Returns:
+
+		*this* * (10 ** *n*), truncated to an integer if necessary.
+
+	See Also:
+
+		<pow>, <multiply>
+*/
+BigInteger.prototype.exp10 = function(n) {
+	n = +n;
+	if (n === 0) {
+		return this;
+	}
+	if (Math.abs(n) > Number(MAX_EXP)) {
+		throw new Error("exponent too large in BigInteger.exp10");
+	}
+	// Optimization for this == 0. This also keeps us from having to trim zeros in the positive n case
+	if (this._s === 0) {
+		return ZERO;
+	}
+	if (n > 0) {
+		var k = new BigInteger(this._d.slice(), this._s, CONSTRUCT);
+
+		for (; n >= BigInteger_base_log10; n -= BigInteger_base_log10) {
+			k._d.unshift(0);
+		}
+		if (n == 0)
+			return k;
+		k._s = 1;
+		k = k.multiplySingleDigit(Math.pow(10, n));
+		return (this._s < 0 ? k.negate() : k);
+	} else if (-n >= this._d.length*BigInteger_base_log10) {
+		return ZERO;
+	} else {
+		var k = new BigInteger(this._d.slice(), this._s, CONSTRUCT);
+
+		for (n = -n; n >= BigInteger_base_log10; n -= BigInteger_base_log10) {
+			k._d.shift();
+		}
+		return (n == 0) ? k : k.divRemSmall(Math.pow(10, n))[0];
+	}
+};
+
+/*
+	Function: pow
+	Raise a <BigInteger> to a power.
+
+	In this implementation, 0**0 is 1.
+
+	Parameters:
+
+		n - The exponent to raise *this* by. *n* must be no greater than
+		<BigInteger.MAX_EXP> (0x7FFFFFFF), or an exception will be thrown.
+
+	Returns:
+
+		*this* raised to the *nth* power.
+
+	See Also:
+
+		<modPow>
+*/
+BigInteger.prototype.pow = function(n) {
+	if (this.isUnit()) {
+		if (this._s > 0) {
+			return this;
+		}
+		else {
+			return BigInteger(n).isOdd() ? this : this.negate();
+		}
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return ONE;
+	}
+	else if (n._s < 0) {
+		if (this._s === 0) {
+			throw new Error("Divide by zero");
+		}
+		else {
+			return ZERO;
+		}
+	}
+	if (this._s === 0) {
+		return ZERO;
+	}
+	if (n.isUnit()) {
+		return this;
+	}
+
+	if (n.compareAbs(MAX_EXP) > 0) {
+		throw new Error("exponent too large in BigInteger.pow");
+	}
+	var x = this;
+	var aux = ONE;
+	var two = BigInteger.small[2];
+
+	while (n.isPositive()) {
+		if (n.isOdd()) {
+			aux = aux.multiply(x);
+			if (n.isUnit()) {
+				return aux;
+			}
+		}
+		x = x.square();
+		n = n.quotient(two);
+	}
+
+	return aux;
+};
+
+/*
+	Function: modPow
+	Raise a <BigInteger> to a power (mod m).
+
+	Because it is reduced by a modulus, <modPow> is not limited by
+	<BigInteger.MAX_EXP> like <pow>.
+
+	Parameters:
+
+		exponent - The exponent to raise *this* by. Must be positive.
+		modulus - The modulus.
+
+	Returns:
+
+		*this* ^ *exponent* (mod *modulus*).
+
+	See Also:
+
+		<pow>, <mod>
+*/
+BigInteger.prototype.modPow = function(exponent, modulus) {
+	var result = ONE;
+	var base = this;
+
+	while (exponent.isPositive()) {
+		if (exponent.isOdd()) {
+			result = result.multiply(base).remainder(modulus);
+		}
+
+		exponent = exponent.quotient(BigInteger.small[2]);
+		if (exponent.isPositive()) {
+			base = base.square().remainder(modulus);
+		}
+	}
+
+	return result;
+};
+
+/*
+	Function: log
+	Get the natural logarithm of a <BigInteger> as a native JavaScript number.
+
+	This is equivalent to
+
+	> Math.log(this.toJSValue())
+
+	but handles values outside of the native number range.
+
+	Returns:
+
+		log( *this* )
+
+	See Also:
+
+		<toJSValue>
+*/
+BigInteger.prototype.log = function() {
+	switch (this._s) {
+	case 0:	 return -Infinity;
+	case -1: return NaN;
+	default: // Fall through.
+	}
+
+	var l = this._d.length;
+
+	if (l*BigInteger_base_log10 < 30) {
+		return Math.log(this.valueOf());
+	}
+
+	var N = Math.ceil(30/BigInteger_base_log10);
+	var firstNdigits = this._d.slice(l - N);
+	return Math.log((new BigInteger(firstNdigits, 1, CONSTRUCT)).valueOf()) + (l - N) * Math.log(BigInteger_base);
+};
+
+/*
+	Function: valueOf
+	Convert a <BigInteger> to a native JavaScript integer.
+
+	This is called automatically by JavaScipt to convert a <BigInteger> to a
+	native value.
+
+	Returns:
+
+		> parseInt(this.toString(), 10)
+
+	See Also:
+
+		<toString>, <toJSValue>
+*/
+BigInteger.prototype.valueOf = function() {
+	return parseInt(this.toString(), 10);
+};
+
+/*
+	Function: toJSValue
+	Convert a <BigInteger> to a native JavaScript integer.
+
+	This is the same as valueOf, but more explicitly named.
+
+	Returns:
+
+		> parseInt(this.toString(), 10)
+
+	See Also:
+
+		<toString>, <valueOf>
+*/
+BigInteger.prototype.toJSValue = function() {
+	return parseInt(this.toString(), 10);
+};
+
+var MAX_EXP = BigInteger(0x7FFFFFFF);
+// Constant: MAX_EXP
+// The largest exponent allowed in <pow> and <exp10> (0x7FFFFFFF or 2147483647).
+BigInteger.MAX_EXP = MAX_EXP;
+
+(function() {
+	function makeUnary(fn) {
+		return function(a) {
+			return fn.call(BigInteger(a));
+		};
+	}
+
+	function makeBinary(fn) {
+		return function(a, b) {
+			return fn.call(BigInteger(a), BigInteger(b));
+		};
+	}
+
+	function makeTrinary(fn) {
+		return function(a, b, c) {
+			return fn.call(BigInteger(a), BigInteger(b), BigInteger(c));
+		};
+	}
+
+	(function() {
+		var i, fn;
+		var unary = "toJSValue,isEven,isOdd,sign,isZero,isNegative,abs,isUnit,square,negate,isPositive,toString,next,prev,log".split(",");
+		var binary = "compare,remainder,divRem,subtract,add,quotient,divide,multiply,pow,compareAbs".split(",");
+		var trinary = ["modPow"];
+
+		for (i = 0; i < unary.length; i++) {
+			fn = unary[i];
+			BigInteger[fn] = makeUnary(BigInteger.prototype[fn]);
+		}
+
+		for (i = 0; i < binary.length; i++) {
+			fn = binary[i];
+			BigInteger[fn] = makeBinary(BigInteger.prototype[fn]);
+		}
+
+		for (i = 0; i < trinary.length; i++) {
+			fn = trinary[i];
+			BigInteger[fn] = makeTrinary(BigInteger.prototype[fn]);
+		}
+
+		BigInteger.exp10 = function(x, n) {
+			return BigInteger(x).exp10(n);
+		};
+	})();
+})();
+
+exports.BigInteger = BigInteger;
+})(typeof exports !== 'undefined' ? exports : this);
diff --git a/frontend/gamma/js/Clipperz/Crypto/biginteger.js b/frontend/gamma/js/Clipperz/Crypto/biginteger.js
new file mode 100644
index 0000000..3f56d18
--- /dev/null
+++ b/frontend/gamma/js/Clipperz/Crypto/biginteger.js
@@ -0,0 +1,1620 @@
+/*
+	JavaScript BigInteger library version 0.9.1
+	http://silentmatt.com/biginteger/
+
+	Copyright (c) 2009 Matthew Crumley <email@matthewcrumley.com>
+	Copyright (c) 2010,2011 by John Tobey <John.Tobey@gmail.com>
+	Licensed under the MIT license.
+
+	Support for arbitrary internal representation base was added by
+	Vitaly Magerya.
+*/
+
+/*
+	File: biginteger.js
+
+	Exports:
+
+		<BigInteger>
+*/
+(function(exports) {
+"use strict";
+/*
+	Class: BigInteger
+	An arbitrarily-large integer.
+
+	<BigInteger> objects should be considered immutable. None of the "built-in"
+	methods modify *this* or their arguments. All properties should be
+	considered private.
+
+	All the methods of <BigInteger> instances can be called "statically". The
+	static versions are convenient if you don't already have a <BigInteger>
+	object.
+
+	As an example, these calls are equivalent.
+
+	> BigInteger(4).multiply(5); // returns BigInteger(20);
+	> BigInteger.multiply(4, 5); // returns BigInteger(20);
+
+	> var a = 42;
+	> var a = BigInteger.toJSValue("0b101010"); // Not completely useless...
+*/
+
+var CONSTRUCT = {}; // Unique token to call "private" version of constructor
+
+/*
+	Constructor: BigInteger()
+	Convert a value to a <BigInteger>.
+
+	Although <BigInteger()> is the constructor for <BigInteger> objects, it is
+	best not to call it as a constructor. If *n* is a <BigInteger> object, it is
+	simply returned as-is. Otherwise, <BigInteger()> is equivalent to <parse>
+	without a radix argument.
+
+	> var n0 = BigInteger();      // Same as <BigInteger.ZERO>
+	> var n1 = BigInteger("123"); // Create a new <BigInteger> with value 123
+	> var n2 = BigInteger(123);   // Create a new <BigInteger> with value 123
+	> var n3 = BigInteger(n2);    // Return n2, unchanged
+
+	The constructor form only takes an array and a sign. *n* must be an
+	array of numbers in little-endian order, where each digit is between 0
+	and BigInteger.base.  The second parameter sets the sign: -1 for
+	negative, +1 for positive, or 0 for zero. The array is *not copied and
+	may be modified*. If the array contains only zeros, the sign parameter
+	is ignored and is forced to zero.
+
+	> new BigInteger([5], -1): create a new BigInteger with value -5
+
+	Parameters:
+
+		n - Value to convert to a <BigInteger>.
+
+	Returns:
+
+		A <BigInteger> value.
+
+	See Also:
+
+		<parse>, <BigInteger>
+*/
+function BigInteger(n, s, token) {
+	if (token !== CONSTRUCT) {
+		if (n instanceof BigInteger) {
+			return n;
+		}
+		else if (typeof n === "undefined") {
+			return ZERO;
+		}
+		return BigInteger.parse(n);
+	}
+
+	n = n || [];  // Provide the nullary constructor for subclasses.
+	while (n.length && !n[n.length - 1]) {
+		--n.length;
+	}
+	this._d = n;
+	this._s = n.length ? (s || 1) : 0;
+}
+
+BigInteger._construct = function(n, s) {
+	return new BigInteger(n, s, CONSTRUCT);
+};
+
+// Base-10 speedup hacks in parse, toString, exp10 and log functions
+// require base to be a power of 10. 10^7 is the largest such power
+// that won't cause a precision loss when digits are multiplied.
+var BigInteger_base = 10000000;
+var BigInteger_base_log10 = 7;
+
+BigInteger.base = BigInteger_base;
+BigInteger.base_log10 = BigInteger_base_log10;
+
+var ZERO = new BigInteger([], 0, CONSTRUCT);
+// Constant: ZERO
+// <BigInteger> 0.
+BigInteger.ZERO = ZERO;
+
+var ONE = new BigInteger([1], 1, CONSTRUCT);
+// Constant: ONE
+// <BigInteger> 1.
+BigInteger.ONE = ONE;
+
+var M_ONE = new BigInteger(ONE._d, -1, CONSTRUCT);
+// Constant: M_ONE
+// <BigInteger> -1.
+BigInteger.M_ONE = M_ONE;
+
+// Constant: _0
+// Shortcut for <ZERO>.
+BigInteger._0 = ZERO;
+
+// Constant: _1
+// Shortcut for <ONE>.
+BigInteger._1 = ONE;
+
+/*
+	Constant: small
+	Array of <BigIntegers> from 0 to 36.
+
+	These are used internally for parsing, but useful when you need a "small"
+	<BigInteger>.
+
+	See Also:
+
+		<ZERO>, <ONE>, <_0>, <_1>
+*/
+BigInteger.small = [
+	ZERO,
+	ONE,
+	/* Assuming BigInteger_base > 36 */
+	new BigInteger( [2], 1, CONSTRUCT),
+	new BigInteger( [3], 1, CONSTRUCT),
+	new BigInteger( [4], 1, CONSTRUCT),
+	new BigInteger( [5], 1, CONSTRUCT),
+	new BigInteger( [6], 1, CONSTRUCT),
+	new BigInteger( [7], 1, CONSTRUCT),
+	new BigInteger( [8], 1, CONSTRUCT),
+	new BigInteger( [9], 1, CONSTRUCT),
+	new BigInteger([10], 1, CONSTRUCT),
+	new BigInteger([11], 1, CONSTRUCT),
+	new BigInteger([12], 1, CONSTRUCT),
+	new BigInteger([13], 1, CONSTRUCT),
+	new BigInteger([14], 1, CONSTRUCT),
+	new BigInteger([15], 1, CONSTRUCT),
+	new BigInteger([16], 1, CONSTRUCT),
+	new BigInteger([17], 1, CONSTRUCT),
+	new BigInteger([18], 1, CONSTRUCT),
+	new BigInteger([19], 1, CONSTRUCT),
+	new BigInteger([20], 1, CONSTRUCT),
+	new BigInteger([21], 1, CONSTRUCT),
+	new BigInteger([22], 1, CONSTRUCT),
+	new BigInteger([23], 1, CONSTRUCT),
+	new BigInteger([24], 1, CONSTRUCT),
+	new BigInteger([25], 1, CONSTRUCT),
+	new BigInteger([26], 1, CONSTRUCT),
+	new BigInteger([27], 1, CONSTRUCT),
+	new BigInteger([28], 1, CONSTRUCT),
+	new BigInteger([29], 1, CONSTRUCT),
+	new BigInteger([30], 1, CONSTRUCT),
+	new BigInteger([31], 1, CONSTRUCT),
+	new BigInteger([32], 1, CONSTRUCT),
+	new BigInteger([33], 1, CONSTRUCT),
+	new BigInteger([34], 1, CONSTRUCT),
+	new BigInteger([35], 1, CONSTRUCT),
+	new BigInteger([36], 1, CONSTRUCT)
+];
+
+// Used for parsing/radix conversion
+BigInteger.digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ".split("");
+
+/*
+	Method: toString
+	Convert a <BigInteger> to a string.
+
+	When *base* is greater than 10, letters are upper case.
+
+	Parameters:
+
+		base - Optional base to represent the number in (default is base 10).
+		       Must be between 2 and 36 inclusive, or an Error will be thrown.
+
+	Returns:
+
+		The string representation of the <BigInteger>.
+*/
+BigInteger.prototype.toString = function(base) {
+	base = +base || 10;
+	if (base < 2 || base > 36) {
+		throw new Error("illegal radix " + base + ".");
+	}
+	if (this._s === 0) {
+		return "0";
+	}
+	if (base === 10) {
+		var str = this._s < 0 ? "-" : "";
+		str += this._d[this._d.length - 1].toString();
+		for (var i = this._d.length - 2; i >= 0; i--) {
+			var group = this._d[i].toString();
+			while (group.length < BigInteger_base_log10) group = '0' + group;
+			str += group;
+		}
+		return str;
+	}
+	else {
+		var numerals = BigInteger.digits;
+		base = BigInteger.small[base];
+		var sign = this._s;
+
+		var n = this.abs();
+		var digits = [];
+		var digit;
+
+		while (n._s !== 0) {
+			var divmod = n.divRem(base);
+			n = divmod[0];
+			digit = divmod[1];
+			// TODO: This could be changed to unshift instead of reversing at the end.
+			// Benchmark both to compare speeds.
+			digits.push(numerals[digit.valueOf()]);
+		}
+		return (sign < 0 ? "-" : "") + digits.reverse().join("");
+	}
+};
+
+// Verify strings for parsing
+BigInteger.radixRegex = [
+	/^$/,
+	/^$/,
+	/^[01]*$/,
+	/^[012]*$/,
+	/^[0-3]*$/,
+	/^[0-4]*$/,
+	/^[0-5]*$/,
+	/^[0-6]*$/,
+	/^[0-7]*$/,
+	/^[0-8]*$/,
+	/^[0-9]*$/,
+	/^[0-9aA]*$/,
+	/^[0-9abAB]*$/,
+	/^[0-9abcABC]*$/,
+	/^[0-9a-dA-D]*$/,
+	/^[0-9a-eA-E]*$/,
+	/^[0-9a-fA-F]*$/,
+	/^[0-9a-gA-G]*$/,
+	/^[0-9a-hA-H]*$/,
+	/^[0-9a-iA-I]*$/,
+	/^[0-9a-jA-J]*$/,
+	/^[0-9a-kA-K]*$/,
+	/^[0-9a-lA-L]*$/,
+	/^[0-9a-mA-M]*$/,
+	/^[0-9a-nA-N]*$/,
+	/^[0-9a-oA-O]*$/,
+	/^[0-9a-pA-P]*$/,
+	/^[0-9a-qA-Q]*$/,
+	/^[0-9a-rA-R]*$/,
+	/^[0-9a-sA-S]*$/,
+	/^[0-9a-tA-T]*$/,
+	/^[0-9a-uA-U]*$/,
+	/^[0-9a-vA-V]*$/,
+	/^[0-9a-wA-W]*$/,
+	/^[0-9a-xA-X]*$/,
+	/^[0-9a-yA-Y]*$/,
+	/^[0-9a-zA-Z]*$/
+];
+
+/*
+	Function: parse
+	Parse a string into a <BigInteger>.
+
+	*base* is optional but, if provided, must be from 2 to 36 inclusive. If
+	*base* is not provided, it will be guessed based on the leading characters
+	of *s* as follows:
+
+	- "0x" or "0X": *base* = 16
+	- "0c" or "0C": *base* = 8
+	- "0b" or "0B": *base* = 2
+	- else: *base* = 10
+
+	If no base is provided, or *base* is 10, the number can be in exponential
+	form. For example, these are all valid:
+
+	> BigInteger.parse("1e9");              // Same as "1000000000"
+	> BigInteger.parse("1.234*10^3");       // Same as 1234
+	> BigInteger.parse("56789 * 10 ** -2"); // Same as 567
+
+	If any characters fall outside the range defined by the radix, an exception
+	will be thrown.
+
+	Parameters:
+
+		s - The string to parse.
+		base - Optional radix (default is to guess based on *s*).
+
+	Returns:
+
+		a <BigInteger> instance.
+*/
+BigInteger.parse = function(s, base) {
+	// Expands a number in exponential form to decimal form.
+	// expandExponential("-13.441*10^5") === "1344100";
+	// expandExponential("1.12300e-1") === "0.112300";
+	// expandExponential(1000000000000000000000000000000) === "1000000000000000000000000000000";
+	function expandExponential(str) {
+		str = str.replace(/\s*[*xX]\s*10\s*(\^|\*\*)\s*/, "e");
+
+		return str.replace(/^([+\-])?(\d+)\.?(\d*)[eE]([+\-]?\d+)$/, function(x, s, n, f, c) {
+			c = +c;
+			var l = c < 0;
+			var i = n.length + c;
+			x = (l ? n : f).length;
+			c = ((c = Math.abs(c)) >= x ? c - x + l : 0);
+			var z = (new Array(c + 1)).join("0");
+			var r = n + f;
+			return (s || "") + (l ? r = z + r : r += z).substr(0, i += l ? z.length : 0) + (i < r.length ? "." + r.substr(i) : "");
+		});
+	}
+
+	s = s.toString();
+	if (typeof base === "undefined" || +base === 10) {
+		s = expandExponential(s);
+	}
+
+	var prefixRE;
+	if (typeof base === "undefined") {
+		prefixRE = '0[xcb]';
+	}
+	else if (base == 16) {
+		prefixRE = '0x';
+	}
+	else if (base == 8) {
+		prefixRE = '0c';
+	}
+	else if (base == 2) {
+		prefixRE = '0b';
+	}
+	else {
+		prefixRE = '';
+	}
+	var parts = new RegExp('^([+\\-]?)(' + prefixRE + ')?([0-9a-z]*)(?:\\.\\d*)?$', 'i').exec(s);
+	if (parts) {
+		var sign = parts[1] || "+";
+		var baseSection = parts[2] || "";
+		var digits = parts[3] || "";
+
+		if (typeof base === "undefined") {
+			// Guess base
+			if (baseSection === "0x" || baseSection === "0X") { // Hex
+				base = 16;
+			}
+			else if (baseSection === "0c" || baseSection === "0C") { // Octal
+				base = 8;
+			}
+			else if (baseSection === "0b" || baseSection === "0B") { // Binary
+				base = 2;
+			}
+			else {
+				base = 10;
+			}
+		}
+		else if (base < 2 || base > 36) {
+			throw new Error("Illegal radix " + base + ".");
+		}
+
+		base = +base;
+
+		// Check for digits outside the range
+		if (!(BigInteger.radixRegex[base].test(digits))) {
+			throw new Error("Bad digit for radix " + base);
+		}
+
+		// Strip leading zeros, and convert to array
+		digits = digits.replace(/^0+/, "").split("");
+		if (digits.length === 0) {
+			return ZERO;
+		}
+
+		// Get the sign (we know it's not zero)
+		sign = (sign === "-") ? -1 : 1;
+
+		// Optimize 10
+		if (base == 10) {
+			var d = [];
+			while (digits.length >= BigInteger_base_log10) {
+				d.push(parseInt(digits.splice(digits.length-BigInteger.base_log10, BigInteger.base_log10).join(''), 10));
+			}
+			d.push(parseInt(digits.join(''), 10));
+			return new BigInteger(d, sign, CONSTRUCT);
+		}
+
+		// Do the conversion
+		var d = ZERO;
+		base = BigInteger.small[base];
+		var small = BigInteger.small;
+		for (var i = 0; i < digits.length; i++) {
+			d = d.multiply(base).add(small[parseInt(digits[i], 36)]);
+		}
+		return new BigInteger(d._d, sign, CONSTRUCT);
+	}
+	else {
+		throw new Error("Invalid BigInteger format: " + s);
+	}
+};
+
+/*
+	Function: add
+	Add two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to add to *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		The numbers added together.
+
+	See Also:
+
+		<subtract>, <multiply>, <quotient>, <next>
+*/
+BigInteger.prototype.add = function(n) {
+	if (this._s === 0) {
+		return BigInteger(n);
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return this;
+	}
+	if (this._s !== n._s) {
+		n = n.negate();
+		return this.subtract(n);
+	}
+
+	var a = this._d;
+	var b = n._d;
+	var al = a.length;
+	var bl = b.length;
+	var sum = new Array(Math.max(al, bl) + 1);
+	var size = Math.min(al, bl);
+	var carry = 0;
+	var digit;
+
+	for (var i = 0; i < size; i++) {
+		digit = a[i] + b[i] + carry;
+		sum[i] = digit % BigInteger_base;
+		carry = (digit / BigInteger_base) | 0;
+	}
+	if (bl > al) {
+		a = b;
+		al = bl;
+	}
+	for (i = size; carry && i < al; i++) {
+		digit = a[i] + carry;
+		sum[i] = digit % BigInteger_base;
+		carry = (digit / BigInteger_base) | 0;
+	}
+	if (carry) {
+		sum[i] = carry;
+	}
+
+	for ( ; i < al; i++) {
+		sum[i] = a[i];
+	}
+
+	return new BigInteger(sum, this._s, CONSTRUCT);
+};
+
+/*
+	Function: negate
+	Get the additive inverse of a <BigInteger>.
+
+	Returns:
+
+		A <BigInteger> with the same magnatude, but with the opposite sign.
+
+	See Also:
+
+		<abs>
+*/
+BigInteger.prototype.negate = function() {
+	return new BigInteger(this._d, (-this._s) | 0, CONSTRUCT);
+};
+
+/*
+	Function: abs
+	Get the absolute value of a <BigInteger>.
+
+	Returns:
+
+		A <BigInteger> with the same magnatude, but always positive (or zero).
+
+	See Also:
+
+		<negate>
+*/
+BigInteger.prototype.abs = function() {
+	return (this._s < 0) ? this.negate() : this;
+};
+
+/*
+	Function: subtract
+	Subtract two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to subtract from *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		The *n* subtracted from *this*.
+
+	See Also:
+
+		<add>, <multiply>, <quotient>, <prev>
+*/
+BigInteger.prototype.subtract = function(n) {
+	if (this._s === 0) {
+		return BigInteger(n).negate();
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return this;
+	}
+	if (this._s !== n._s) {
+		n = n.negate();
+		return this.add(n);
+	}
+
+	var m = this;
+	// negative - negative => -|a| - -|b| => -|a| + |b| => |b| - |a|
+	if (this._s < 0) {
+		m = new BigInteger(n._d, 1, CONSTRUCT);
+		n = new BigInteger(this._d, 1, CONSTRUCT);
+	}
+
+	// Both are positive => a - b
+	var sign = m.compareAbs(n);
+	if (sign === 0) {
+		return ZERO;
+	}
+	else if (sign < 0) {
+		// swap m and n
+		var t = n;
+		n = m;
+		m = t;
+	}
+
+	// a > b
+	var a = m._d;
+	var b = n._d;
+	var al = a.length;
+	var bl = b.length;
+	var diff = new Array(al); // al >= bl since a > b
+	var borrow = 0;
+	var i;
+	var digit;
+
+	for (i = 0; i < bl; i++) {
+		digit = a[i] - borrow - b[i];
+		if (digit < 0) {
+			digit += BigInteger_base;
+			borrow = 1;
+		}
+		else {
+			borrow = 0;
+		}
+		diff[i] = digit;
+	}
+	for (i = bl; i < al; i++) {
+		digit = a[i] - borrow;
+		if (digit < 0) {
+			digit += BigInteger_base;
+		}
+		else {
+			diff[i++] = digit;
+			break;
+		}
+		diff[i] = digit;
+	}
+	for ( ; i < al; i++) {
+		diff[i] = a[i];
+	}
+
+	return new BigInteger(diff, sign, CONSTRUCT);
+};
+
+(function() {
+	function addOne(n, sign) {
+		var a = n._d;
+		var sum = a.slice();
+		var carry = true;
+		var i = 0;
+
+		while (true) {
+			var digit = (a[i] || 0) + 1;
+			sum[i] = digit % BigInteger_base;
+			if (digit <= BigInteger_base - 1) {
+				break;
+			}
+			++i;
+		}
+
+		return new BigInteger(sum, sign, CONSTRUCT);
+	}
+
+	function subtractOne(n, sign) {
+		var a = n._d;
+		var sum = a.slice();
+		var borrow = true;
+		var i = 0;
+
+		while (true) {
+			var digit = (a[i] || 0) - 1;
+			if (digit < 0) {
+				sum[i] = digit + BigInteger_base;
+			}
+			else {
+				sum[i] = digit;
+				break;
+			}
+			++i;
+		}
+
+		return new BigInteger(sum, sign, CONSTRUCT);
+	}
+
+	/*
+		Function: next
+		Get the next <BigInteger> (add one).
+
+		Returns:
+
+			*this* + 1.
+
+		See Also:
+
+			<add>, <prev>
+	*/
+	BigInteger.prototype.next = function() {
+		switch (this._s) {
+		case 0:
+			return ONE;
+		case -1:
+			return subtractOne(this, -1);
+		// case 1:
+		default:
+			return addOne(this, 1);
+		}
+	};
+
+	/*
+		Function: prev
+		Get the previous <BigInteger> (subtract one).
+
+		Returns:
+
+			*this* - 1.
+
+		See Also:
+
+			<next>, <subtract>
+	*/
+	BigInteger.prototype.prev = function() {
+		switch (this._s) {
+		case 0:
+			return M_ONE;
+		case -1:
+			return addOne(this, -1);
+		// case 1:
+		default:
+			return subtractOne(this, 1);
+		}
+	};
+})();
+
+/*
+	Function: compareAbs
+	Compare the absolute value of two <BigIntegers>.
+
+	Calling <compareAbs> is faster than calling <abs> twice, then <compare>.
+
+	Parameters:
+
+		n - The number to compare to *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		-1, 0, or +1 if *|this|* is less than, equal to, or greater than *|n|*.
+
+	See Also:
+
+		<compare>, <abs>
+*/
+BigInteger.prototype.compareAbs = function(n) {
+	if (this === n) {
+		return 0;
+	}
+
+	if (!(n instanceof BigInteger)) {
+		if (!isFinite(n)) {
+			return(isNaN(n) ? n : -1);
+		}
+		n = BigInteger(n);
+	}
+
+	if (this._s === 0) {
+		return (n._s !== 0) ? -1 : 0;
+	}
+	if (n._s === 0) {
+		return 1;
+	}
+
+	var l = this._d.length;
+	var nl = n._d.length;
+	if (l < nl) {
+		return -1;
+	}
+	else if (l > nl) {
+		return 1;
+	}
+
+	var a = this._d;
+	var b = n._d;
+	for (var i = l-1; i >= 0; i--) {
+		if (a[i] !== b[i]) {
+			return a[i] < b[i] ? -1 : 1;
+		}
+	}
+
+	return 0;
+};
+
+/*
+	Function: compare
+	Compare two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to compare to *this*. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		-1, 0, or +1 if *this* is less than, equal to, or greater than *n*.
+
+	See Also:
+
+		<compareAbs>, <isPositive>, <isNegative>, <isUnit>
+*/
+BigInteger.prototype.compare = function(n) {
+	if (this === n) {
+		return 0;
+	}
+
+	n = BigInteger(n);
+
+	if (this._s === 0) {
+		return -n._s;
+	}
+
+	if (this._s === n._s) { // both positive or both negative
+		var cmp = this.compareAbs(n);
+		return cmp * this._s;
+	}
+	else {
+		return this._s;
+	}
+};
+
+/*
+	Function: isUnit
+	Return true iff *this* is either 1 or -1.
+
+	Returns:
+
+		true if *this* compares equal to <BigInteger.ONE> or <BigInteger.M_ONE>.
+
+	See Also:
+
+		<isZero>, <isNegative>, <isPositive>, <compareAbs>, <compare>,
+		<BigInteger.ONE>, <BigInteger.M_ONE>
+*/
+BigInteger.prototype.isUnit = function() {
+	return this === ONE ||
+		this === M_ONE ||
+		(this._d.length === 1 && this._d[0] === 1);
+};
+
+/*
+	Function: multiply
+	Multiply two <BigIntegers>.
+
+	Parameters:
+
+		n - The number to multiply *this* by. Will be converted to a
+		<BigInteger>.
+
+	Returns:
+
+		The numbers multiplied together.
+
+	See Also:
+
+		<add>, <subtract>, <quotient>, <square>
+*/
+BigInteger.prototype.multiply = function(n) {
+	// TODO: Consider adding Karatsuba multiplication for large numbers
+	if (this._s === 0) {
+		return ZERO;
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return ZERO;
+	}
+	if (this.isUnit()) {
+		if (this._s < 0) {
+			return n.negate();
+		}
+		return n;
+	}
+	if (n.isUnit()) {
+		if (n._s < 0) {
+			return this.negate();
+		}
+		return this;
+	}
+	if (this === n) {
+		return this.square();
+	}
+
+	var r = (this._d.length >= n._d.length);
+	var a = (r ? this : n)._d; // a will be longer than b
+	var b = (r ? n : this)._d;
+	var al = a.length;
+	var bl = b.length;
+
+	var pl = al + bl;
+	var partial = new Array(pl);
+	var i;
+	for (i = 0; i < pl; i++) {
+		partial[i] = 0;
+	}
+
+	for (i = 0; i < bl; i++) {
+		var carry = 0;
+		var bi = b[i];
+		var jlimit = al + i;
+		var digit;
+		for (var j = i; j < jlimit; j++) {
+			digit = partial[j] + bi * a[j - i] + carry;
+			carry = (digit / BigInteger_base) | 0;
+			partial[j] = (digit % BigInteger_base) | 0;
+		}
+		if (carry) {
+			digit = partial[j] + carry;
+			carry = (digit / BigInteger_base) | 0;
+			partial[j] = digit % BigInteger_base;
+		}
+	}
+	return new BigInteger(partial, this._s * n._s, CONSTRUCT);
+};
+
+// Multiply a BigInteger by a single-digit native number
+// Assumes that this and n are >= 0
+// This is not really intended to be used outside the library itself
+BigInteger.prototype.multiplySingleDigit = function(n) {
+	if (n === 0 || this._s === 0) {
+		return ZERO;
+	}
+	if (n === 1) {
+		return this;
+	}
+
+	var digit;
+	if (this._d.length === 1) {
+		digit = this._d[0] * n;
+		if (digit >= BigInteger_base) {
+			return new BigInteger([(digit % BigInteger_base)|0,
+					(digit / BigInteger_base)|0], 1, CONSTRUCT);
+		}
+		return new BigInteger([digit], 1, CONSTRUCT);
+	}
+
+	if (n === 2) {
+		return this.add(this);
+	}
+	if (this.isUnit()) {
+		return new BigInteger([n], 1, CONSTRUCT);
+	}
+
+	var a = this._d;
+	var al = a.length;
+
+	var pl = al + 1;
+	var partial = new Array(pl);
+	for (var i = 0; i < pl; i++) {
+		partial[i] = 0;
+	}
+
+	var carry = 0;
+	for (var j = 0; j < al; j++) {
+		digit = n * a[j] + carry;
+		carry = (digit / BigInteger_base) | 0;
+		partial[j] = (digit % BigInteger_base) | 0;
+	}
+	if (carry) {
+		partial[j] = carry;
+	}
+
+	return new BigInteger(partial, 1, CONSTRUCT);
+};
+
+/*
+	Function: square
+	Multiply a <BigInteger> by itself.
+
+	This is slightly faster than regular multiplication, since it removes the
+	duplicated multiplcations.
+
+	Returns:
+
+		> this.multiply(this)
+
+	See Also:
+		<multiply>
+*/
+BigInteger.prototype.square = function() {
+	// Normally, squaring a 10-digit number would take 100 multiplications.
+	// Of these 10 are unique diagonals, of the remaining 90 (100-10), 45 are repeated.
+	// This procedure saves (N*(N-1))/2 multiplications, (e.g., 45 of 100 multiplies).
+	// Based on code by Gary Darby, Intellitech Systems Inc., www.DelphiForFun.org
+
+	if (this._s === 0) {
+		return ZERO;
+	}
+	if (this.isUnit()) {
+		return ONE;
+	}
+
+	var digits = this._d;
+	var length = digits.length;
+	var imult1 = new Array(length + length + 1);
+	var product, carry, k;
+	var i;
+
+	// Calculate diagonal
+	for (i = 0; i < length; i++) {
+		k = i * 2;
+		product = digits[i] * digits[i];
+		carry = (product / BigInteger_base) | 0;
+		imult1[k] = product % BigInteger_base;
+		imult1[k + 1] = carry;
+	}
+
+	// Calculate repeating part
+	for (i = 0; i < length; i++) {
+		carry = 0;
+		k = i * 2 + 1;
+		for (var j = i + 1; j < length; j++, k++) {
+			product = digits[j] * digits[i] * 2 + imult1[k] + carry;
+			carry = (product / BigInteger_base) | 0;
+			imult1[k] = product % BigInteger_base;
+		}
+		k = length + i;
+		var digit = carry + imult1[k];
+		carry = (digit / BigInteger_base) | 0;
+		imult1[k] = digit % BigInteger_base;
+		imult1[k + 1] += carry;
+	}
+
+	return new BigInteger(imult1, 1, CONSTRUCT);
+};
+
+/*
+	Function: quotient
+	Divide two <BigIntegers> and truncate towards zero.
+
+	<quotient> throws an exception if *n* is zero.
+
+	Parameters:
+
+		n - The number to divide *this* by. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		The *this* / *n*, truncated to an integer.
+
+	See Also:
+
+		<add>, <subtract>, <multiply>, <divRem>, <remainder>
+*/
+BigInteger.prototype.quotient = function(n) {
+	return this.divRem(n)[0];
+};
+
+/*
+	Function: divide
+	Deprecated synonym for <quotient>.
+*/
+BigInteger.prototype.divide = BigInteger.prototype.quotient;
+
+/*
+	Function: remainder
+	Calculate the remainder of two <BigIntegers>.
+
+	<remainder> throws an exception if *n* is zero.
+
+	Parameters:
+
+		n - The remainder after *this* is divided *this* by *n*. Will be
+		    converted to a <BigInteger>.
+
+	Returns:
+
+		*this* % *n*.
+
+	See Also:
+
+		<divRem>, <quotient>
+*/
+BigInteger.prototype.remainder = function(n) {
+	return this.divRem(n)[1];
+};
+
+/*
+	Function: divRem
+	Calculate the integer quotient and remainder of two <BigIntegers>.
+
+	<divRem> throws an exception if *n* is zero.
+
+	Parameters:
+
+		n - The number to divide *this* by. Will be converted to a <BigInteger>.
+
+	Returns:
+
+		A two-element array containing the quotient and the remainder.
+
+		> a.divRem(b)
+
+		is exactly equivalent to
+
+		> [a.quotient(b), a.remainder(b)]
+
+		except it is faster, because they are calculated at the same time.
+
+	See Also:
+
+		<quotient>, <remainder>
+*/
+BigInteger.prototype.divRem = function(n) {
+	n = BigInteger(n);
+	if (n._s === 0) {
+		throw new Error("Divide by zero");
+	}
+	if (this._s === 0) {
+		return [ZERO, ZERO];
+	}
+	if (n._d.length === 1) {
+		return this.divRemSmall(n._s * n._d[0]);
+	}
+
+	// Test for easy cases -- |n1| <= |n2|
+	switch (this.compareAbs(n)) {
+	case 0: // n1 == n2
+		return [this._s === n._s ? ONE : M_ONE, ZERO];
+	case -1: // |n1| < |n2|
+		return [ZERO, this];
+	}
+
+	var sign = this._s * n._s;
+	var a = n.abs();
+	var b_digits = this._d;
+	var b_index = b_digits.length;
+	var digits = n._d.length;
+	var quot = [];
+	var guess;
+
+	var part = new BigInteger([], 0, CONSTRUCT);
+
+	while (b_index) {
+		part._d.unshift(b_digits[--b_index]);
+		part = new BigInteger(part._d, 1, CONSTRUCT);
+
+		if (part.compareAbs(n) < 0) {
+			quot.push(0);
+			continue;
+		}
+		if (part._s === 0) {
+			guess = 0;
+		}
+		else {
+			var xlen = part._d.length, ylen = a._d.length;
+			var highx = part._d[xlen-1]*BigInteger_base + part._d[xlen-2];
+			var highy = a._d[ylen-1]*BigInteger_base + a._d[ylen-2];
+			if (part._d.length > a._d.length) {
+				// The length of part._d can either match a._d length,
+				// or exceed it by one.
+				highx = (highx+1)*BigInteger_base;
+			}
+			guess = Math.ceil(highx/highy);
+		}
+		do {
+			var check = a.multiplySingleDigit(guess);
+			if (check.compareAbs(part) <= 0) {
+				break;
+			}
+			guess--;
+		} while (guess);
+
+		quot.push(guess);
+		if (!guess) {
+			continue;
+		}
+		var diff = part.subtract(check);
+		part._d = diff._d.slice();
+	}
+
+	return [new BigInteger(quot.reverse(), sign, CONSTRUCT),
+		   new BigInteger(part._d, this._s, CONSTRUCT)];
+};
+
+// Throws an exception if n is outside of (-BigInteger.base, -1] or
+// [1, BigInteger.base).  It's not necessary to call this, since the
+// other division functions will call it if they are able to.
+BigInteger.prototype.divRemSmall = function(n) {
+	var r;
+	n = +n;
+	if (n === 0) {
+		throw new Error("Divide by zero");
+	}
+
+	var n_s = n < 0 ? -1 : 1;
+	var sign = this._s * n_s;
+	n = Math.abs(n);
+
+	if (n < 1 || n >= BigInteger_base) {
+		throw new Error("Argument out of range");
+	}
+
+	if (this._s === 0) {
+		return [ZERO, ZERO];
+	}
+
+	if (n === 1 || n === -1) {
+		return [(sign === 1) ? this.abs() : new BigInteger(this._d, sign, CONSTRUCT), ZERO];
+	}
+
+	// 2 <= n < BigInteger_base
+
+	// divide a single digit by a single digit
+	if (this._d.length === 1) {
+		var q = new BigInteger([(this._d[0] / n) | 0], 1, CONSTRUCT);
+		r = new BigInteger([(this._d[0] % n) | 0], 1, CONSTRUCT);
+		if (sign < 0) {
+			q = q.negate();
+		}
+		if (this._s < 0) {
+			r = r.negate();
+		}
+		return [q, r];
+	}
+
+	var digits = this._d.slice();
+	var quot = new Array(digits.length);
+	var part = 0;
+	var diff = 0;
+	var i = 0;
+	var guess;
+
+	while (digits.length) {
+		part = part * BigInteger_base + digits[digits.length - 1];
+		if (part < n) {
+			quot[i++] = 0;
+			digits.pop();
+			diff = BigInteger_base * diff + part;
+			continue;
+		}
+		if (part === 0) {
+			guess = 0;
+		}
+		else {
+			guess = (part / n) | 0;
+		}
+
+		var check = n * guess;
+		diff = part - check;
+		quot[i++] = guess;
+		if (!guess) {
+			digits.pop();
+			continue;
+		}
+
+		digits.pop();
+		part = diff;
+	}
+
+	r = new BigInteger([diff], 1, CONSTRUCT);
+	if (this._s < 0) {
+		r = r.negate();
+	}
+	return [new BigInteger(quot.reverse(), sign, CONSTRUCT), r];
+};
+
+/*
+	Function: isEven
+	Return true iff *this* is divisible by two.
+
+	Note that <BigInteger.ZERO> is even.
+
+	Returns:
+
+		true if *this* is even, false otherwise.
+
+	See Also:
+
+		<isOdd>
+*/
+BigInteger.prototype.isEven = function() {
+	var digits = this._d;
+	return this._s === 0 || digits.length === 0 || (digits[0] % 2) === 0;
+};
+
+/*
+	Function: isOdd
+	Return true iff *this* is not divisible by two.
+
+	Returns:
+
+		true if *this* is odd, false otherwise.
+
+	See Also:
+
+		<isEven>
+*/
+BigInteger.prototype.isOdd = function() {
+	return !this.isEven();
+};
+
+/*
+	Function: sign
+	Get the sign of a <BigInteger>.
+
+	Returns:
+
+		* -1 if *this* < 0
+		* 0 if *this* == 0
+		* +1 if *this* > 0
+
+	See Also:
+
+		<isZero>, <isPositive>, <isNegative>, <compare>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.sign = function() {
+	return this._s;
+};
+
+/*
+	Function: isPositive
+	Return true iff *this* > 0.
+
+	Returns:
+
+		true if *this*.compare(<BigInteger.ZERO>) == 1.
+
+	See Also:
+
+		<sign>, <isZero>, <isNegative>, <isUnit>, <compare>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.isPositive = function() {
+	return this._s > 0;
+};
+
+/*
+	Function: isNegative
+	Return true iff *this* < 0.
+
+	Returns:
+
+		true if *this*.compare(<BigInteger.ZERO>) == -1.
+
+	See Also:
+
+		<sign>, <isPositive>, <isZero>, <isUnit>, <compare>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.isNegative = function() {
+	return this._s < 0;
+};
+
+/*
+	Function: isZero
+	Return true iff *this* == 0.
+
+	Returns:
+
+		true if *this*.compare(<BigInteger.ZERO>) == 0.
+
+	See Also:
+
+		<sign>, <isPositive>, <isNegative>, <isUnit>, <BigInteger.ZERO>
+*/
+BigInteger.prototype.isZero = function() {
+	return this._s === 0;
+};
+
+/*
+	Function: exp10
+	Multiply a <BigInteger> by a power of 10.
+
+	This is equivalent to, but faster than
+
+	> if (n >= 0) {
+	>     return this.multiply(BigInteger("1e" + n));
+	> }
+	> else { // n <= 0
+	>     return this.quotient(BigInteger("1e" + -n));
+	> }
+
+	Parameters:
+
+		n - The power of 10 to multiply *this* by. *n* is converted to a
+		javascipt number and must be no greater than <BigInteger.MAX_EXP>
+		(0x7FFFFFFF), or an exception will be thrown.
+
+	Returns:
+
+		*this* * (10 ** *n*), truncated to an integer if necessary.
+
+	See Also:
+
+		<pow>, <multiply>
+*/
+BigInteger.prototype.exp10 = function(n) {
+	n = +n;
+	if (n === 0) {
+		return this;
+	}
+	if (Math.abs(n) > Number(MAX_EXP)) {
+		throw new Error("exponent too large in BigInteger.exp10");
+	}
+	// Optimization for this == 0. This also keeps us from having to trim zeros in the positive n case
+	if (this._s === 0) {
+		return ZERO;
+	}
+	if (n > 0) {
+		var k = new BigInteger(this._d.slice(), this._s, CONSTRUCT);
+
+		for (; n >= BigInteger_base_log10; n -= BigInteger_base_log10) {
+			k._d.unshift(0);
+		}
+		if (n == 0)
+			return k;
+		k._s = 1;
+		k = k.multiplySingleDigit(Math.pow(10, n));
+		return (this._s < 0 ? k.negate() : k);
+	} else if (-n >= this._d.length*BigInteger_base_log10) {
+		return ZERO;
+	} else {
+		var k = new BigInteger(this._d.slice(), this._s, CONSTRUCT);
+
+		for (n = -n; n >= BigInteger_base_log10; n -= BigInteger_base_log10) {
+			k._d.shift();
+		}
+		return (n == 0) ? k : k.divRemSmall(Math.pow(10, n))[0];
+	}
+};
+
+/*
+	Function: pow
+	Raise a <BigInteger> to a power.
+
+	In this implementation, 0**0 is 1.
+
+	Parameters:
+
+		n - The exponent to raise *this* by. *n* must be no greater than
+		<BigInteger.MAX_EXP> (0x7FFFFFFF), or an exception will be thrown.
+
+	Returns:
+
+		*this* raised to the *nth* power.
+
+	See Also:
+
+		<modPow>
+*/
+BigInteger.prototype.pow = function(n) {
+	if (this.isUnit()) {
+		if (this._s > 0) {
+			return this;
+		}
+		else {
+			return BigInteger(n).isOdd() ? this : this.negate();
+		}
+	}
+
+	n = BigInteger(n);
+	if (n._s === 0) {
+		return ONE;
+	}
+	else if (n._s < 0) {
+		if (this._s === 0) {
+			throw new Error("Divide by zero");
+		}
+		else {
+			return ZERO;
+		}
+	}
+	if (this._s === 0) {
+		return ZERO;
+	}
+	if (n.isUnit()) {
+		return this;
+	}
+
+	if (n.compareAbs(MAX_EXP) > 0) {
+		throw new Error("exponent too large in BigInteger.pow");
+	}
+	var x = this;
+	var aux = ONE;
+	var two = BigInteger.small[2];
+
+	while (n.isPositive()) {
+		if (n.isOdd()) {
+			aux = aux.multiply(x);
+			if (n.isUnit()) {
+				return aux;
+			}
+		}
+		x = x.square();
+		n = n.quotient(two);
+	}
+
+	return aux;
+};
+
+/*
+	Function: modPow
+	Raise a <BigInteger> to a power (mod m).
+
+	Because it is reduced by a modulus, <modPow> is not limited by
+	<BigInteger.MAX_EXP> like <pow>.
+
+	Parameters:
+
+		exponent - The exponent to raise *this* by. Must be positive.
+		modulus - The modulus.
+
+	Returns:
+
+		*this* ^ *exponent* (mod *modulus*).
+
+	See Also:
+
+		<pow>, <mod>
+*/
+BigInteger.prototype.modPow = function(exponent, modulus) {
+	var result = ONE;
+	var base = this;
+
+	while (exponent.isPositive()) {
+		if (exponent.isOdd()) {
+			result = result.multiply(base).remainder(modulus);
+		}
+
+		exponent = exponent.quotient(BigInteger.small[2]);
+		if (exponent.isPositive()) {
+			base = base.square().remainder(modulus);
+		}
+	}
+
+	return result;
+};
+
+/*
+	Function: log
+	Get the natural logarithm of a <BigInteger> as a native JavaScript number.
+
+	This is equivalent to
+
+	> Math.log(this.toJSValue())
+
+	but handles values outside of the native number range.
+
+	Returns:
+
+		log( *this* )
+
+	See Also:
+
+		<toJSValue>
+*/
+BigInteger.prototype.log = function() {
+	switch (this._s) {
+	case 0:	 return -Infinity;
+	case -1: return NaN;
+	default: // Fall through.
+	}
+
+	var l = this._d.length;
+
+	if (l*BigInteger_base_log10 < 30) {
+		return Math.log(this.valueOf());
+	}
+
+	var N = Math.ceil(30/BigInteger_base_log10);
+	var firstNdigits = this._d.slice(l - N);
+	return Math.log((new BigInteger(firstNdigits, 1, CONSTRUCT)).valueOf()) + (l - N) * Math.log(BigInteger_base);
+};
+
+/*
+	Function: valueOf
+	Convert a <BigInteger> to a native JavaScript integer.
+
+	This is called automatically by JavaScipt to convert a <BigInteger> to a
+	native value.
+
+	Returns:
+
+		> parseInt(this.toString(), 10)
+
+	See Also:
+
+		<toString>, <toJSValue>
+*/
+BigInteger.prototype.valueOf = function() {
+	return parseInt(this.toString(), 10);
+};
+
+/*
+	Function: toJSValue
+	Convert a <BigInteger> to a native JavaScript integer.
+
+	This is the same as valueOf, but more explicitly named.
+
+	Returns:
+
+		> parseInt(this.toString(), 10)
+
+	See Also:
+
+		<toString>, <valueOf>
+*/
+BigInteger.prototype.toJSValue = function() {
+	return parseInt(this.toString(), 10);
+};
+
+var MAX_EXP = BigInteger(0x7FFFFFFF);
+// Constant: MAX_EXP
+// The largest exponent allowed in <pow> and <exp10> (0x7FFFFFFF or 2147483647).
+BigInteger.MAX_EXP = MAX_EXP;
+
+(function() {
+	function makeUnary(fn) {
+		return function(a) {
+			return fn.call(BigInteger(a));
+		};
+	}
+
+	function makeBinary(fn) {
+		return function(a, b) {
+			return fn.call(BigInteger(a), BigInteger(b));
+		};
+	}
+
+	function makeTrinary(fn) {
+		return function(a, b, c) {
+			return fn.call(BigInteger(a), BigInteger(b), BigInteger(c));
+		};
+	}
+
+	(function() {
+		var i, fn;
+		var unary = "toJSValue,isEven,isOdd,sign,isZero,isNegative,abs,isUnit,square,negate,isPositive,toString,next,prev,log".split(",");
+		var binary = "compare,remainder,divRem,subtract,add,quotient,divide,multiply,pow,compareAbs".split(",");
+		var trinary = ["modPow"];
+
+		for (i = 0; i < unary.length; i++) {
+			fn = unary[i];
+			BigInteger[fn] = makeUnary(BigInteger.prototype[fn]);
+		}
+
+		for (i = 0; i < binary.length; i++) {
+			fn = binary[i];
+			BigInteger[fn] = makeBinary(BigInteger.prototype[fn]);
+		}
+
+		for (i = 0; i < trinary.length; i++) {
+			fn = trinary[i];
+			BigInteger[fn] = makeTrinary(BigInteger.prototype[fn]);
+		}
+
+		BigInteger.exp10 = function(x, n) {
+			return BigInteger(x).exp10(n);
+		};
+	})();
+})();
+
+exports.BigInteger = BigInteger;
+})(typeof exports !== 'undefined' ? exports : this);