Very large (tested for more than 2048 bits) prime number generator and tester program. This is well written and based on solid algorithms in this field. Source code is my own, used for Masters course in Cryptography. Program has easily readable and

crypto-strong pseudorandom numbers w/algorithm Blum, Blum, and Shub

Blum-Goldwasser Probabilistic Cipher (BGC) Function and Blum-Goldwasser Probabilistic Decipher (BGC) Function

Simplistic implementation of a Blum-Micali based stream cipher