Mini-Geek (915324) writes "GIMPS has announced M45 and M46, found September 6 and August 23 respectively. Both numbers are over 10,000,000 digits, having 11,185,272 and 12,978,189 respectively. The numbers are 243,112,609-1 and 237,156,667-1. M45 and M46 were discovered by Hans-Michael Elvenich and Edson Smith respectively. GIMPS will claim the EFF's $100K reward for the first prime number with over 10,000,000 digits. GIMPS will split the prize money by their prize rules, with $50,000 going to the discoverer of M46. The discoverer of M45 will not receive any prize money, since he discovered M45 after M46. M45 is 'the first Mersenne prime to be discovered out of order since Colquitt and Welsh discovered 2110,503-1 in 1988.' Read more about both new primes at http://www.mersenne.org/."