As I am planning to write my own primality testing program, I have searched GitHub for modern and new primality testing algorithms, a partial list follows:
- https://github.com/tingliu/aks-primality-test (https://en.wikipedia.org/wiki/AKS_primality_test)
- https://github.com/wacchoz/APR_CL (https://math.dartmouth.edu/~carlp/PDF/complexity12.pdf)