Variable-precision arithmetic

Every now and then I have a need to compute arbitrarily large numbers. Can anyone recommend a good (free) library in any language that is worth taking a look at?

It'd be nice to have a list for most popular languages, like Java has BigInt and other Big* classes but I'd like to know if other languages have similar products.

re: Variable-precision arithmetic

This wiki page mentions quite a few libraries for bignum functionality.

kind regards,

Jos

re: Variable-precision arithmetic

i like the LibTomMath in C, its not the best of best, but the download file includes a pdf with tom's book about bignum maths.

you can download it from here

HTH