big.js
A small, fast, easy-to-use library for arbitrary-precision decimal arithmetic
mathjs
Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif
bignumber.js
A library for arbitrary-precision decimal and non-decimal arithmetic
decimal.js
An arbitrary-precision Decimal type for JavaScript.
jsbn
The jsbn library is a fast, portable implementation of large-number math in pure JavaScript, enabling public-key crypto and other applications on desktop and mobile browsers.