I'd suggest https://en.wikipedia.org/wiki/Finite_field https://en.wikipedia.org/wiki/Finite_field - they'd probably get to the page you linked in trying to unde

I'd suggest https://en.wikipedia.org/wiki/Finite_field https://en.wikipedia.org/wiki/Finite_field - they'd probably get to the page you linked in trying to understand finite fields, but finite fields (AKA Galois fields) are exactly what the post is about.