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

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MnStatusDetails
2643331Factored
FactorDigitsBitsDate
9336629695343357979473692479.62021-03-01 13:11:44
ECM
DigitsB1Curves
255000093 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Peter Kraatz7144128EC59E9F450
Verified (Factored)1999-05-23Olle Murby7144128EC59E9F451579171
Verified (Factored)2018-07-13kkmrkkblmbrbk7144128EC59E9F451645816
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-03-01mrh651F16243C53FE901150363753
History
DateUserTypeResult
2021-03-01James HeinrichCERT
PRP Certification
Proof certified good
2021-03-01mrhC-PRP
M2643331/933662969534335797947369 : 651F16243C53FE90
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-01ZenzomaF-ECM
Factor: 933662969534335797947369 / (ECM curve 3, B1=50000, B2=5000000, Sigma=1736762876362456)
2019-11-27masserNF-PM1
B1=2000000, B2=50000000, E=12
2019-03-04TJAOINF
no factor from 2^67 to 2^68
2018-07-13kkmrkkblmbrbkC-LL
7144128EC59E9F45
2017-09-08Gordon SpenceNF
no factor from 2^66 to 2^67
2017-05-08JossNF-PM1
B1=360000, B2=3600000, E=6
2016-12-27JossNF-PM1
B1=206385
2016-12-26JossNF-PM1
B1=171988
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-21ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-04Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-18James HeinrichNF-PM1
B1=180000, B2=4320000, E=6
2009-06-22USAFSSNF-PM1
B1=30000, B2=420000
2009-01-26Sturle SundeNF
no factor from 2^60 to 2^61