Here is a javascript bigint library by Leemon Baird http://www.leemon.com/crypto/BigInt.js http://www.leemon.com/crypto/BigInt.js It's about the best I've see

Here is a javascript bigint library by Leemon Baird http://www.leemon.com/crypto/BigInt.js http://www.leemon.com/crypto/BigInt.js It's about the best I've seen and embodies all the principles that are being explained by Matt.