Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
5156897Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
P-1
B1 = 4000000
B2 = 9110873310
ECM
DigitsB1Curves
2550000105 / 280
Estimated T-Level: 21.9 ⓘ
LL
StatusDateUserResidueShift
VerifiedDavid A McGough8212EE33FD3D821D0
Verified2000-05-24Alastair Knox8212EE33FD3D821D4206934
History
DateUserTypeResult
2024-10-18Andrew BNF
no factor from 2^71 to 2^72
2022-07-05Sid & AndyNF-PM1
B1=4000000, B2=9110873310
2022-01-23mikrNF
no factor from 2^70 to 2^71
2021-11-18TJAOINF
no factor from 2^69 to 2^70
2020-11-30TJAOINF
no factor from 2^68 to 2^69
2018-06-20ramgeisNF
no factor from 2^67 to 2^68
2017-02-21Squeeky_SquirrelNF-PM1
B1=310000, B2=9687500, E=12
2016-06-01Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^61
2015-08-07snme2pm1NF
no factor from 2^65 to 2^66
2014-12-17VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-17VictordeHollanderNF
no factor from 2^63 to 2^64
2009-09-28USAFSSNF-PM1
B1=55000, B2=935000, E=6
2009-06-24GrunwalderGIMPNF
no factor from 2^62 to 2^63
2008-10-12Sturle SundeNF
no factor from 2^61 to 2^62