Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
42451699
Composite: proven not-prime with Lucas-Lehmer test
No factors below 274
TF target 272
P-1
B1 = 515000
B2 = 14291250
LL
StatusDateUserResidueShiftSoftware
Verified2008-07-25Kelly Kelley24A7F063EA489C2C25962374Windows,Prime95,v24 final,(aka Wc1)
Verified2017-11-05Dubslow24A7F063EA489C2C38481060Linux 64-bit,Prime95,v28.7,build 1
History
DateUserTypeResult
2022-04-10TheJudgerNFno factor TF: 73-74
2022-04-10TheJudgerNFno factor TF: 72-73
2017-11-05DubslowC-LL24A7F063EA489C2C
2015-08-27-anonymous-NFno factor TF: 71-72
2015-04-27HBendtzNFno factor TF: 69-70
2015-04-10Mark RoseNFno factor TF: 70-71
2015-04-10Mark RoseNFno factor TF: 69-70
2014-01-02LaurVNFno factor TF: 68-69
2008-07-25KprimeC-LL24A7F063EA489C2C
2008-06-13KprimeNF-PM1B1=515000, B2=14291250
2007-06-151997rj7NFno factor TF: 1-68