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

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Exponent Range:










MnStatusDetails
4734151Factored
FactorDigitsBitsDate
519751370637793542224439567432995.42023-02-07 03:03:30
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-08-02chris pilgrim6973FA31F1BA449B0
Verified (Factored)2000-01-04Brian6973FA31F1BA449B2007331
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-02-12Naegi Makoto74C9EE49385C7E051386248453
P-1 factors
DateFactorB1B2
2023-02-075197513706377935422244395674355000008994176100
History
DateUserTypeResult
2023-02-12ANONYMOUSCERT
PRP Certification
Proof certified good
2023-02-12Naegi MakotoC-PRP
M4734151/51975137063779354222443956743 : 74C9EE49385C7E05
PRP proof power = 7
PRP: Verified
Proof certified good
2023-02-07Sid & AndyF-PM1
Factor: 51975137063779354222443956743 / (P-1, B1=5500000, B2=8994176100)
2021-09-01Jon PaceNF
no factor from 2^70 to 2^71
2021-08-22SRBaseNF
no factor from 2^69 to 2^70
2021-05-17TJAOINF
no factor from 2^68 to 2^69
2018-10-01YxinityNF
no factor from 2^67 to 2^68
2017-12-14YxinityNF
no factor from 2^66 to 2^67
2016-11-30Squeeky_SquirrelNF-PM1
B1=290000, B2=8700000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-13snme2pm1NF
no factor from 2^65 to 2^66
2015-01-11VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-11VictordeHollanderNF
no factor from 2^63 to 2^64
2011-11-15Squeeky_SquirrelNF-PM1
B1=80000, B2=1360000, E=6
2011-10-25GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-06-09markrNF
no factor from 2^61 to 2^62
2009-09-06Carsten KossendeyNF-PM1
B1=25000, B2=387500