Please read this:
Some of you may have heard about Distributed.net. They are running 2 (or 3) projects right now. One is cracking a RC5 key, and the other(s) are OGR (24 and) 25.
I recently read about this guy who installed the distributed.net client on the computers at his school. About a year later, the school found out about it, and had a cow. They wouldn't have been as mad, but the computers were cracking the RC5 key, and there was prize money for the person who cracked the key.
Here's a semi-old link:
http://news.cnet.com/news/0-1005-200-6740797.html Anyways, all you people at school, you better get permission to run this, otherwise, they may get you. They may not care, but if I were in that situation, I would check. Sure, there's no money on the line, but it doesn't matter.