Mathematical Digest Short Summaries of Articles about Mathematics in the Popular Press "Priming the Pump," Random Samples, Science, 7 December 2001, p. 2087; and "Searchers capture a champion megaprime," by Ivars Peterson. Science News, 15 December 2001, p. 372. These two articles tell of the discovery of the largest known Mersenne prime, 2^{13,466,917}  1. A Mersenne prime is a prime number of the form 2^{p}  1, where p is prime. This discovery was made by 20year old Michael Cameron as part of the Great Internet Mersenne Prime Search (GIMPS), a distributed computing project. More information on GIMPS can be found at www.mersenne.org  Mike Breen
