modexp64

Modular exponentiation in NodeJS using 64 bits unsigned numbers. Implemented in C++.

Installation

Install via npm:

npm install modexp64 --save

Example usage

var modexp = require('modexp64');

// 0x3E8 = 1000
// It calcs (2^10) % 1000
var result = modexp('2', '10', '0x3E8');

// Prints 18 (in hexadecimal)
console.log(result);

// Prints 24 (in decimal)
console.log(parseInt(result, 16));

API Documentation

modexp(base, exp, mod): It takes 3 strings. They can be decimal numbers or hexadecimal ones (prefixed with "0x"). It returns a string with the result in hexadecimal (with no prefix).