javascript-biginteger
Usage Examples
In Node.js
const BigInteger = require('./path/to/biginteger').BigInteger;
var a = BigInteger('123456789');
var b = BigInteger('10000000000');
var c = BigInteger('987654321');
console.log(a.multiply(b).add(c).toString()); // '1234567890987654321'
In a web browser
<script src="path/to/biginteger.js"></script>
<script>
var a = BigInteger('123456789');
var b = BigInteger('10000000000');
var c = BigInteger('987654321');
console.log(a.multiply(b).add(c).toString()); // '1234567890987654321'
</script>