'''Ariel T. Glenn''' (née Laura A. Nickel) with Landon Curt Noll discovered on October 30, 1978 that 221701 − 1 was the 25th Mersenne prime. This made international news because Noll and Nickel were still [[high school]] students. For the verification of this number alone, the pair used almost eight hours of time on a CDC Cyber 174 at California State University. They consumed over 4000 hours of [[computer]] time in their search double testing M21001 through M24481, along with a test of M65537 using a custom implementation of the Lucas-Lehmer test. | '''Ariel T. Glenn''' (née Laura A. Nickel) with Landon Curt Noll discovered on October 30, 1978 that 221701 − 1 was the 25th Mersenne prime. This made international news because Noll and Nickel were still [[high school]] students. For the verification of this number alone, the pair used almost eight hours of time on a CDC Cyber 174 at California State University. They consumed over 4000 hours of [[computer]] time in their search double testing M21001 through M24481, along with a test of M65537 using a custom implementation of the Lucas-Lehmer test. |