A new possible Mersenne Prime has been found. This would be the 41st Mersenne Prime number and the largest so far. To quote a couple of messages from George Woltman :

So far the result looks genuine. It was run using version 23 by a top 1000 contributor. If proven correct it will be another world record for GIMPS!!

BTW, it is a new prime. The user sent in his save file. I reran the final 15,000 iterations and prime95 rediscovered the prime. There is no known method for creating a bogus save file that falsely rediscovers the prime.

I've given fewer hints than in the past because you readers are so good at sleuthing! However, the 10 million digit question is important to many folks. So......the new Mersenne prime is NOT ten million digits.

Read more on the Mersenne Forum http://www.mersenneforum.org/