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As I understand it a CRC8 has 4,294,967,296 possible answers. A CRC8 would have 256.
I posted a message on the database board ( [webmasterworld.com...] ) about fun binary math in MySQL. The question is, if you have a site like last.fm, can you use binary sets to discover how users' band preferences inter-relate.
Jim likes 10010110
Jill likes 11010000
Bob likes 01000001
Ergo, Jim and Jill share bands one and four. Jim and Bob share no bands, and Bob and Jill share one.
Since this is a PHP question too, any ideas?