Lists of small primes 
(Another of the Prime Pages' resources)
 GIMPS found two new primes: 243112609-1 (about 12.9 million digits, Aug 08) and 237156667-1 (only 11.1 million digits, Sept 08).


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What is small?  Depends on your context, but since this site focuses on titanic prime (those with more that 1000 digits), any prime with less that 1000 digit is small.  Here we provide lists of the first fifty million primes as well as a few hundred proven small primes (10-300 digits or so) to test various algorithms.
The Prime Pages
Another prime page by Chris K. Caldwell <caldwell@utm.edu>