gmp

The GMP (GNU Multiple Precision) extension in PHP provides functions for working with arbitrary-length integers

The GMP (GNU Multiple Precision) extension in PHP provides functions for working with arbitrary-length integers, offering high-precision arithmetic. This extension is included by default but needs activation in the `php.ini` file. Uncomment the line `;extension=gmp` and restart your web server to use GMP functions.

Already included with PHP.