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

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Exponent Range:










MnStatusDetails
1122983Composite: proven not-prime with both PRP and Lucas-Lehmer tests
TF
No factors below 271
TF target 260
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 15000000
B2 = 51171114540
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8 ⓘ
LL
StatusDateUserResidueShift
VerifiedDavid Slowinski11690
VerifiedThe Grebelius Family1C9EFEA53778D1690
Verified2002-05-11S574831C9EFEA53778D1691109606
Verified2016-06-01MadPoo1C9EFEA53778D169932394
PRP
StatusDateUserResidueShiftTypeBase
Verified2020-11-05Ethan O'Connor1EB5E1D334A95ED6100586513
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-12-29-Anonymous-factor ECM smallC1S10.00 % 2024-12-29
2024-12-14-Anonymous-factor ECM small0.00 % 2024-12-14
History
DateUserTypeResult
2023-05-27mikrNF-PM1
B1=15000000, B2=51171114540
2022-11-10JossNF-PM1
B1=1122983, B2=12482419950
2022-10-19Wentao HuangNF-PM1
B1=112000, B2=1468185810
2020-11-05Franklin WebberCERT
PRP Certification
CERT proof power = 6
Proof certified good
2020-11-05Ethan O'ConnorC-PRP
1EB5E1D334A95ED6
PRP proof power = 6
PRP: Verified
Proof certified good
2016-06-01MadPooC-LL
1C9EFEA53778D169
2016-03-22ramgeisNF
no factor from 2^70 to 2^71
2016-03-19ramgeisNF
no factor from 2^69 to 2^70
2016-03-19ramgeisNF
no factor from 2^68 to 2^69
2016-03-18ramgeisNF
no factor from 2^67 to 2^68
2016-03-12Smok_bmv NF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-06-21omylistNF
no factor from 2^65 to 2^66
2015-01-03Matthias WurtingerNF
no factor from 2^64 to 2^65
2014-12-23Matthias WurtingerNF
no factor from 2^63 to 2^64
2013-10-01David CampeauNF-PM1
B1=3650000, B2=131400000, E=12
2012-10-18dbaughNF
no factor from 2^62 to 2^63
2011-10-26c10ck3rNF
no factor from 2^61 to 2^62
2009-02-16Sturle SundeNF
no factor from 2^60 to 2^61