Small portable multiple-precision unsigned integer arithmetic in C

Arbitrary-sized integer class for C++

Library for Multiprecision Compile-Time and Run-Time Arithmetic (including Modular Arithmetic)

PHP Base62 encoder and decoder for integers and big integers with Laravel 5 support.

BigInt in C++

BeeNum is an arbitrary-precision arithmetic library.

long arithmetic library

Delphi/Pascal module for very big integers

A templated C++ library for big integers and large floating point numbers.

Pausable/resumable pi digits generator using new JS BigInt. Demo: https://betafcc.github.io/pi-generator

A lightweight library for very large integer arithmetic.

An implementation of big integer library in C++

Sum array representation of big numbers

Three simple algorithms in Rust that convert a number from decimal to binary.

Arbitrary precision arithmetic

golang implementation of arbitrary precision currency

simple big integer library

C++ big integer implementation

Длинная арифметика на языке C++20 с подробным описанием алгоритмов

PF2, Summer 2016