GMP [1] is the canonical solution for this. It's very fast (at scale) and has bindings to every useful language out there. It's also not that bad for small argu

GMP [1] is the canonical solution for this. It's very fast (at scale) and has bindings to every useful language out there. It's also not that bad for small arguments. If GMP is not suitable, you're probably doing something fairly unique. In that case, details matter, like language, architecture, etc. [1] https://gmplib.org/ https://gmplib.org/