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:










MnStatusDetails
4245407Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 265
P-1
B1 = 6200000
B2 = 26697300630
ECM
DigitsB1Curves
2550000134 / 280
Estimated T-Level: 22.4 ⓘ
LL
StatusDateUserResidueShift
VerifiedDoug Fortune85CBD370824A57380
Verified2000-02-16Hugh Garner85CBD370824A5738380465
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2024-11-17TheJudgerNF
no factor from 2^71 to 2^72
2022-05-07DRobinsonPENF-PM1
B1=6200000, B2=26697300630
2021-01-24-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-23-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-23-Anonymous-NF
no factor from 2^68 to 2^69
2018-11-13chuenkitNF
no factor from 2^67 to 2^68
2018-01-07YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-10snme2pm1NF
no factor from 2^65 to 2^66
2014-01-03David CampeauNF
no factor from 2^64 to 2^65
2013-12-15JayderNF
no factor from 2^63 to 2^64
2013-10-05Squeeky_SquirrelNF-PM1
B1=145000, B2=3588750, E=6
2012-01-31GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-08-17Squeeky_SquirrelNF-PM1
B1=50000, B2=762500, E=6
2011-01-13markrNF
no factor from 2^61 to 2^62
2009-08-04Carsten KossendeyNF-PM1
B1=25000, B2=337500