Rats, I was hoping there was something here that would optimize $powmod.
Hmm. Okay. I took another look at it. I replaced one modulus 2 call with the MAPM function is_odd(), I used the MAPM sqr() function for the square, and replaced the other modulus calls and one division call with the integer versions. I am shocked, I tell you, shocked that it is now twice as fast :-] This change will be in the next beta.
