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

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MnStatusDetails
2645341Factored
FactorDigitsBitsDate
215738498640234586511499248177686334110.72021-04-04 14:20:54
ECM
DigitsB1Curves
255000091 / 280
Estimated T-Level: 21.6
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1997-11-29David R HoyleB7392ED153FD021F0
Verified (Factored)1999-06-06chris clarkB7392ED153FD021F2095293
Verified (Factored)2018-07-14kkmrkkblmbrbkB7392ED153FD021F1581642
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-04-05XZT7ACF4B529D72DFBF152865753
History
DateUserTypeResult
2021-04-05curtiscCERT
PRP Certification
Proof certified good
2021-04-05XZTC-PRP
M2645341/2157384986402345865114992481776863 : 7ACF4B529D72DFBF
PRP proof power = 7
PRP: Verified
Proof certified good
2021-04-04GANF-ECM
Factor: 2157384986402345865114992481776863 / (ECM curve 1, B1=50000, B2=5000000, Sigma=8233861797526283)
2019-11-28masserNF-PM1
B1=2000000, B2=50000000, E=12
2019-02-25TJAOINF
no factor from 2^67 to 2^68
2018-07-14kkmrkkblmbrbkC-LL
B7392ED153FD021F
2017-09-08Gordon SpenceNF
no factor from 2^66 to 2^67
2017-05-08JossNF-PM1
B1=360000, B2=3600000, E=6
2016-12-29JossNF-PM1
B1=206385
2016-12-27JossNF-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
2012-06-07Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-19James HeinrichNF-PM1
B1=180000, B2=4275000, E=6
2009-06-22USAFSSNF-PM1
B1=30000, B2=420000
2009-01-27Sturle SundeNF
no factor from 2^60 to 2^61