Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
281423Factored
FactorDigitsBitsDate
102511522013214521615896513323595559183107343139.62022-04-16 10:33:38
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000160 / 1566
Estimated T-Level: 30.5 ⓘ
TF below 2^96 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski326F0
Verified (Factored)Unknown326F0
Verified (Factored)Brian J. Beesley9774DA00C135B26F0
Verified (Factored)Eivind Triel9774DA00C135B26F193020
Verified (Factored)2002-03-03Brian J. Beesley9774DA00C135B26F206162
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-04-16SRJ2877ABDD2971E37A5DA2110151253
Verified2022-04-16Kirill FrolovABDD2971E37A5DA2114196353
P-1 factors
DateFactorB1B2
2022-04-1610251152201321452161589651332359555918310731470000003011121313200
History
DateUserTypeResult
2022-04-16KelbCERT
PRP Certification
Proof certified good
2022-04-16Evans PaschalCERT
PRP Certification
Proof certified good
2022-04-16Kirill FrolovC-PRP
M281423/1025115220132145216158965133235955591831073 : ABDD2971E37A5DA2
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-16SRJ2877C-PRP
M281423/1025115220132145216158965133235955591831073 : ABDD2971E37A5DA2
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-16Sid & AndyF-PM1
Factor: 1025115220132145216158965133235955591831073 / (P-1, B1=147000000, B2=3011121313200)
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-12-02Gordon SpenceNF
no factor from 2^65 to 2^66
2018-03-29Gordon SpenceNF
no factor from 2^64 to 2^65
2016-05-13NumberwangNF-PM1
B1=3147, B2=78675
2016-05-13mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2016-01-04Gordon SpenceNF
no factor from 2^63 to 2^64
2016-01-04Gordon SpenceNF
no factor from 2^62 to 2^63
2015-08-13NRNF
no factor from 2^61 to 2^62
2013-11-01David CampeauNF-PM1
B1=5325000, B2=202350000, E=12
2013-06-24lycornNF
no factor from 2^60 to 2^61
2012-05-15JossNF-PM1
B1=5158359
2012-02-26JossNF-PM1
B1=2149316
2011-02-16JossNF-PM1
B1=2000000
2009-01-24Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-02Sturle SundeNF
no factor from 2^58 to 2^59