Big integers in C#

Question

Currently I am borrowing java.math.BigInteger from the J# libraries as described here. Having never used a library for working with large integers before, this seems slow, on the order of 10 times slower, even for ulong length numbers. Does anyone have any better (preferably free) libraries, or is this level of performance normal?

Answer 1

This Looks very promising. It is a C# Wrapper over GMP.

http://web.rememberingemil.org/Projects/GnuMpDotNet/GnuMpDotNet.html

There are also other BigInteger options for .Net here in particular, Mpir.Net