@vzn, sorry, I've been pretty busy with school the last few days! I watched those videos and a few of my own and have found it incredibly interesting. I'm still researching it, of course, but I'm getting sucked in by it. =) Prime factorization program is coming along; haven't worked with it as much as I would've liked, though. I just figured out that there was an error with my logic, so I'm working through that.