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

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MnStatusDetails
959183Factored
FactorDigitsBitsDate
45427097485243883669083180440249438727139128.42022-09-19 15:44:02
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski12CA0
Verified (Factored)Cornelius CaesarC1CBD3A1F3FF52CA0
Verified (Factored)2001-12-22Marc Getty / Phil FizurC1CBD3A1F3FF52CA892641
Verified (Factored)2015-04-11MadPooC1CBD3A1F3FF52CA877515
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-09-24ATHD8CAA10EBE205D76194727553
P-1 factors
DateFactorB1B2
2022-09-19454270974852438836690831804402494387271500000001263691439010
History
DateUserTypeResult
2022-09-24GufesaCERT
PRP Certification
Proof certified good
2022-09-24ATHC-PRP
M959183/454270974852438836690831804402494387271 : D8CAA10EBE205D76
PRP proof power = 6
PRP: Verified
Proof certified good
2022-09-19axnF-PM1
Factor: 454270974852438836690831804402494387271 / (P-1, B1=50000000, B2=1263691439010)
2022-02-21Gordon SpenceNF
no factor from 2^67 to 2^68
2018-10-18BloodERazorNF
no factor from 2^66 to 2^67
2018-04-24BloodERazorNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-04-11MadPooC-LL
C1CBD3A1F3FF52CA
2015-04-01snme2pm1NF
no factor from 2^64 to 2^65
2015-04-01snme2pm1NF
no factor from 2^63 to 2^64
2015-04-01snme2pm1NF
no factor from 2^62 to 2^63
2014-08-31alpertronNF-PM1
B1=10000000, B2=500000000, E=12
2013-12-11lycornNF
no factor from 2^61 to 2^62
2013-10-23David CampeauNF-PM1
B1=850000, B2=25500000, E=12
2012-02-06JossNF-PM1
B1=701336
2011-09-19JossNF-PM1
B1=350668
2011-07-14JossNF-PM1
B1=210400
2011-06-05JossNF-PM1
B1=200000
2010-05-18Architects CubedNF
no factor from 2^60 to 2^61