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

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Exponent Range:










MnStatusDetails
251971Factored
FactorDigitsBitsDate
12359067450321537353149104877679370267139126.52022-02-28 05:04:59
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000526 / 4588
Estimated T-Level: 35.6
TF below 2^113 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski46220
Verified (Factored)Unknown46220
Verified (Factored)Ken Kiefer1D71AE7FD82446220
Verified (Factored)Brian J. Beesley1D71AE7FD82446220
Verified (Factored)Eivind Triel1D71AE7FD8244622137756
Verified (Factored)2016-06-01MadPoo1D71AE7FD82446221971
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-02-28Anton Repko7D9755082454AB6C120700253
Verified2022-02-28LordJulius7D9755082454AB6C117532953
P-1 factors
DateFactorB1B2
2022-02-281235906745032153735314910487767937026711000000000202896101968560
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2022-02-28oldcigaretteCERT
PRP Certification
Proof certified good
2022-02-28LordJuliusC-PRP
M251971/123590674503215373531491048776793702671 : 7D9755082454AB6C
PRP proof power = 5
PRP: Verified
Proof certified good
2022-02-28V-glass PngosCERT
PRP Certification
Proof certified good
2022-02-28Anton RepkoC-PRP
M251971/123590674503215373531491048776793702671 : 7D9755082454AB6C
PRP proof power = 5
PRP: Verified
Proof certified good
2022-02-28-Anonymous-F-PM1
Factor: 123590674503215373531491048776793702671 / (P-1, B1=1000000000, B2=202896101968560)
2021-05-26Anton RepkoNF
no factor from 2^69 to 2^70
2021-05-26Anton RepkoNF
no factor from 2^66 to 2^69
2020-01-06nordiNF-PM1
B1=120000000, B2=2500000000, E=12
2020-01-01Gordon SpenceNF
no factor from 2^65 to 2^66
2018-03-15Gordon SpenceNF
no factor from 2^64 to 2^65
2016-06-01MadPooC-LL
1D71AE7FD8244622
2016-05-13NumberwangNF-PM1
B1=2817, B2=70425
2016-01-28Gordon SpenceNF
no factor from 2^63 to 2^64
2016-01-28Gordon SpenceNF
no factor from 2^62 to 2^63
2015-08-25NRNF
no factor from 2^61 to 2^62
2015-01-16Denial140NF-PM1
B1=10000000, B2=250000000, E=12
2013-10-13David CampeauNF-PM1
B1=2595000, B2=72660000, E=12
2013-07-16Sid & AndyNF
no factor from 2^60 to 2^61
2012-02-26JossNF-PM1
B1=2480555
2011-02-07JossNF-PM1
B1=2000000
2009-01-24Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-01Sturle SundeNF
no factor from 2^58 to 2^59