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

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Exponent Range:










MnStatusDetails
3286951Factored
FactorDigitsBitsDate
9727625544833639380092169.72021-08-09 08:41:20
ECM
DigitsB1Curves
255000058 / 280
Estimated T-Level: 21.0
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Johan Schrooyen7315F559895B62D80
Verified (Factored)2000-01-25The Prime Hunters7315F559895B62D8630178
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-08-12kutens55F6B5C43C7F4354149448753
History
DateUserTypeResult
2022-09-12JossNF-PM1
B1=1000000, B2=241152450
2022-04-02JossNF-PM1
B1=1000000, B2=134316000
2021-08-12curtiscCERT
PRP Certification
Proof certified good
2021-08-12kutensC-PRP
M3286951/972762554483363938009 : 55F6B5C43C7F4354
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-09kutensF-ECM
Factor: 972762554483363938009 / (ECM curve 7, B1=50000, B2=6750000, Sigma=3740824681328100)
2021-07-27MadPooNF
no factor from 2^68 to 2^69
2021-04-01mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-11-19TJAOINF
no factor from 2^67 to 2^68
2017-04-06Gordon SpenceNF
no factor from 2^66 to 2^67
2016-01-25JossNF-PM1
B1=383400, B2=3834000, E=6
2015-06-29ThaNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-10JossNF-PM1
B1=99054
2014-06-26-Anonymous-NF-PM1
B1=79527
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2011-09-28markrNF
no factor from 2^61 to 2^62
2011-09-23USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-07-09Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-01S485122NF
no factor from 2^60 to 2^61