nim-stint

Easiest way to start with nim is via choosenim: https://github.com/dom96/choosenim then `nimble install https://github.com/status-im/nim-stint` Unfortunately I didn't have time to focus on documentation but the easiest way to get started with Stint is to check the tests: https://github.com/status-im/nim-stint/tree/master/tests. The casts are there to check binary representation compatibility in the tests and are not needed otherwise. Alternatively you can check: - https://github.com/FedeOmoto/nim-gmp, A GMP wrapper (very low-level/C-like and not updated since 2015) - https://github.com/status-im/nim-decimal, a arbitrary-precision floating point wrapper to MpDecimal (used by python). Unfortunately it's very low-level/C-like at the moment.

Try "StInt: A fast and portable stack-based multi-precision integer library in pure Nim" Being stack based and having some nice compile time evaluation features should make it very performant. Here: https://github.com/status-im/nim-stint

I would be very interested in the test suite you used. I've finished my own bigint implementation in the Nim language: - stack and power-of-2 only for uint256, uint512, uint1024, etc), - using recursive types (uint128 = 2x uint64, uint256 = 2x uint128). It is already quite optimized (division using Burnikel and Ziegler recursive division for example), but I want to make sure it works fine. https://github.com/status-im/nim-stint