Enables working with integers beyond 53 bits (the upper limit of what JavaScript's Number type can accurately represent).

This is a pure JavaScript library, unlike other libraries that do the same thing. The main benefit of being pure JavaScript is that you can use it in a browser environment:

For Node.js-only projects, consider looking into these C extensions:

• bignum
• bigint

> var bigint = require('bigintjs');

> bigint('99999999999999999999999999999').add('1').toString();
'100000000000000000000000000000'

> bigint('123456789012345678901234567890').multiply('98765432109876543210987654321').toString();
'12193263113702179522618503273362292333223746380111126352690'

> // Bitwise operations on a big number (JavaScript only supports up to 32 bits)
> bigint('0xFFFFFFFFFFFFFFFF').and('0xF0F0F0F0F0F0F0F0').shiftLeft(8).toString();
'4444580219171430789120'

Some basic operations are still missing. Most notably:

• Division (and modulus), but you can use bit shifting for powers of 2
• Comparison (greater than / less than)
• Square root

Feel free to submit a pull request for any of the above.

You can install this package with NPM:

npm install --save bigintjs

To be able to run this in a browser, you need to use a framework that supports CommonJS modules (for example: Browserify).