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

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MnStatusDetails
3137471Factored
FactorDigitsBitsDate
9134338676645589320619192479.62020-11-16 18:53:17
ECM
DigitsB1Curves
255000022 / 280
Estimated T-Level: 20.4
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Greg HewgillF4AE02E5C35CE9180
Verified (Factored)1999-05-30Mark CrawfordF4AE02E5C35CE9182273654
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-11-19arnaud61EEBBA7A467BD571125574653
Verified2020-12-17Oliver Kruse61EEBBA7A467BD57112797753
History
DateUserTypeResult
2021-12-22JossNF-PM1
B1=3137471, B2=637437570
2021-12-19JossNF-PM1
B1=3137471, B2=108997350
2021-11-22JossNF-PM1
B1=3137471
2021-02-18JossNF
no factor from 2^66 to 2^67
2021-02-18JossNF
no factor from 2^65 to 2^66
2021-01-17JossNF-PM1
B1=704000, B2=3137471, E=6
2020-12-17Ben DeloCERT
PRP Certification
Proof certified good
2020-12-17Oliver KruseC-PRP
M3137471/913433867664558932061919 : 61EEBBA7A467BD57
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-19arnaudC-PRP
M3137471/913433867664558932061919 : 61EEBBA7A467BD57
PRP proof power = 7
PRP: Verified
PRP proof never uploaded
2020-11-16daveward2005F-ECM
Factor: 913433867664558932061919 / (ECM curve 7, B1=50000, B2=5000000, Sigma=6890610214465877)
2019-02-02mikrNF-PM1
B1=3000000, B2=100000000, E=12
2019-01-07TJAOINF
no factor from 2^67 to 2^68
2018-07-16JossNF-PM1
B1=674000, B2=4044000
2018-07-15JossNF-PM1
B1=674000, B2=2696000
2017-04-17Gordon SpenceNF
no factor from 2^66 to 2^67
2017-01-10JossNF-PM1
B1=132000
2016-11-06Squeeky_SquirrelNF-PM1
B1=195000, B2=5460000, E=12
2015-06-14ThaNF
no factor from 2^65 to 2^66
2015-02-11VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-11VictordeHollanderNF
no factor from 2^63 to 2^64
2013-09-01Squeeky_SquirrelNF-PM1
B1=110000, B2=2475000, E=6
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-11-09Grant McCrackenNF
no factor from 2^61 to 2^62
2011-09-05Squeeky_SquirrelNF-PM1
B1=55000, B2=935000, E=6
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=183750
2009-04-10S485122NF
no factor from 2^60 to 2^61