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
4141213Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
TF below 2^75 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 18613000
B2 = 395441496450
ECM
DigitsB1Curves
2550000230 / 280
Estimated T-Level: 24.1 ⓘ
LL
StatusDateUserResidueShift
VerifiedSt. Patrick's College (John Cosgrave & Mark Daly & Olivia Bree et. al.)9C9ED74B9ACC928F0
Verified1999-10-29Paul Irish9C9ED74B9ACC928F740231
History
DateUserTypeResult
2025-03-29Jason LynchNF-PM1
B1=18613000, B2=395441496450
2025-01-23Andrew BNF
no factor from 2^71 to 2^72
2024-04-29Denial140NF-PM1
B1=13000000
2022-05-03mikrNF
no factor from 2^70 to 2^71
2021-07-09axnNF-PM1
B1=13000000, B2=650000000
2021-06-11axnNF
no factor from 2^69 to 2^70
2021-05-31TJAOINF
no factor from 2^68 to 2^69
2020-11-26Carlos PinhoNF-PM1
B1=152000, B2=3990000, E=6
2018-11-29YxinityNF
no factor from 2^67 to 2^68
2017-12-16YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-02snme2pm1NF
no factor from 2^65 to 2^66
2013-10-14David CampeauNF
no factor from 2^64 to 2^65
2013-09-19JayderNF
no factor from 2^63 to 2^64
2013-07-07Squeeky_SquirrelNF-PM1
B1=125000, B2=2343750, E=6
2011-08-08USAFSSNF-PM1
B1=45000, B2=630000, E=6
2011-07-01GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-12-21Grant McCrackenNF
no factor from 2^61 to 2^62
2009-07-30Carsten KossendeyNF-PM1
B1=25000, B2=325000