There are 2 repositories under bignum topic.
Small portable multiple-precision unsigned integer arithmetic in C
Constantine: modular, high-performance, zero-dependency cryptography stack for verifiable computation, proof systems and blockchain protocols.
A Kotlin multiplatform library for arbitrary precision arithmetics
A lightweight, Arbitrary Precision Arithmetic Library for Swift!
A replacement for decimal.js for incremental games who want to deal with very large numbers (bigger in magnitude than 1e308, up to as much as 1e(9e15) ) and want to prioritize speed over accuracy.
A Javascript numerical library to represent numbers as large as 10^^1e308 and as small as 10^-10^^1e308. Sequel to break_infinity.js, designed for incremental games.
arbitrary precision arithmetic library
C++ bignum with support for arbitrary precision integer arithmetic.
Additional numeric types for Go (int128, uint128)
Some extra functions to work with modular arithmetics using native JS implementation of BigInt.
Chai assertions for comparing arbitrary-precision integers using the bn.js library
The natural numbers, ℕ = { 0, 1, 2, ... }.