Small portable multiple-precision unsigned integer arithmetic in C
arbitrary precision arithmetic library
Big unsigned integers (128, 256, 384, 512 or more bits), big (signed) integers and big decimal numbers.
The Big Number C library is a C library for arbitrary precision arithmetic. It can be used to perform arithmetic operations on numbers of arbitrary size. It is written in C and is designed to be portable and efficient. You can work with numbers of any size, and the library will automatically allocate memory as needed.
RSA with great number operations implementation in C language, with example code of 256bit rsa-key(could be longer).
Cálculo do fatorial de números gigantes
Implementación propia de la sucesión de Fibonacci con precisión arbitraria
Addition & Subtraction for Big Numbers
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