�PNG  IHDR��;���IDATx��ܻn�0���K�� �)(�pA��� ���7�LeG{�� �§㻢|��ذaÆ 6lذaÆ 6lذaÆ 6lom��$^�y���ذag�5bÆ 6lذaÆ 6lذa{���� 6lذaÆ �`����}H�Fkm�,�m����Ӫ���ô�ô!� �x�|'ܢ˟;�E:���9�&ᶒ�}�{�v]�n&�6� �h��_��t�ڠ͵-ҫ���Z;��Z$�.�P���k�ž)�!��o���>}l�eQfJ�T��u і���چ��\��X=8��Rن4`Vw�l�>����n�G�^��i�s��"ms�$�u��i��?w�bs[m�6�K4���O���.�4��%����/����b�C%��t ��M�ז� �-l�G6�mrz2���s�%�9��s@���-�k�9�=���)������k�B5����\��+͂�Zsٲ ��Rn��~G���R���C����� �wIcI��n7jJ���hۛNCS|���j0��8y�iHKֶۛ�k�Ɉ+;Sz������L/��F�*\��Ԕ�#"5��m�2��[S��������=�g��n�a�P�e�ғ�L�� lذaÆ 6l�^k��̱aÆ 6lذaÆ 6lذa;���� �_��ذaÆ 6lذaÆ 6lذaÆ ���R���IEND�B` var bn = require('bn.js'); var brorand = require('brorand'); function MillerRabin(rand) { this.rand = rand || new brorand.Rand(); } module.exports = MillerRabin; MillerRabin.create = function create(rand) { return new MillerRabin(rand); }; MillerRabin.prototype._randbelow = function _randbelow(n) { var len = n.bitLength(); var min_bytes = Math.ceil(len / 8); // Generage random bytes until a number less than n is found. // This ensures that 0..n-1 have an equal probability of being selected. do var a = new bn(this.rand.generate(min_bytes)); while (a.cmp(n) >= 0); return a; }; MillerRabin.prototype._randrange = function _randrange(start, stop) { // Generate a random number greater than or equal to start and less than stop. var size = stop.sub(start); return start.add(this._randbelow(size)); }; MillerRabin.prototype.test = function test(n, k, cb) { var len = n.bitLength(); var red = bn.mont(n); var rone = new bn(1).toRed(red); if (!k) k = Math.max(1, (len / 48) | 0); // Find d and s, (n - 1) = (2 ^ s) * d; var n1 = n.subn(1); for (var s = 0; !n1.testn(s); s++) {} var d = n.shrn(s); var rn1 = n1.toRed(red); var prime = true; for (; k > 0; k--) { var a = this._randrange(new bn(2), n1); if (cb) cb(a); var x = a.toRed(red).redPow(d); if (x.cmp(rone) === 0 || x.cmp(rn1) === 0) continue; for (var i = 1; i < s; i++) { x = x.redSqr(); if (x.cmp(rone) === 0) return false; if (x.cmp(rn1) === 0) break; } if (i === s) return false; } return prime; }; MillerRabin.prototype.getDivisor = function getDivisor(n, k) { var len = n.bitLength(); var red = bn.mont(n); var rone = new bn(1).toRed(red); if (!k) k = Math.max(1, (len / 48) | 0); // Find d and s, (n - 1) = (2 ^ s) * d; var n1 = n.subn(1); for (var s = 0; !n1.testn(s); s++) {} var d = n.shrn(s); var rn1 = n1.toRed(red); for (; k > 0; k--) { var a = this._randrange(new bn(2), n1); var g = n.gcd(a); if (g.cmpn(1) !== 0) return g; var x = a.toRed(red).redPow(d); if (x.cmp(rone) === 0 || x.cmp(rn1) === 0) continue; for (var i = 1; i < s; i++) { x = x.redSqr(); if (x.cmp(rone) === 0) return x.fromRed().subn(1).gcd(n); if (x.cmp(rn1) === 0) break; } if (i === s) { x = x.redSqr(); return x.fromRed().subn(1).gcd(n); } } return false; };