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

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MnStatusDetails
2617831Factored
FactorDigitsBitsDate
464225860798069711882493832685.32021-09-29 06:33:04
ECM
DigitsB1Curves
2550000124 / 280
Estimated T-Level: 22.2
TF below 2^69 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Willmore15E1E3DB97B27ED40
BadMorris ThompsonBD666385ED8DDB310
BadDavid WillmoreC6DB7431EDDF34E10
Verified (Factored)1999-04-23Scott H.15E1E3DB97B27ED41247286
Verified (Factored)1999-11-10Björn Edstam15E1E3DB97B27ED4475133
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-09-29SRJ28776BA02C9BF4650F42144364753
History
DateUserTypeResult
2021-09-29curtiscCERT
PRP Certification
Proof certified good
2021-09-29SRJ2877C-PRP
M2617831/46422586079806971188249383 : 6BA02C9BF4650F42
PRP proof power = 7
PRP: Verified
Proof certified good
2021-09-29daveward2005F-ECM
Factor: 46422586079806971188249383 / (ECM curve 1, B1=50000, B2=5000000, Sigma=1246299268566976)
2021-05-19TJAOINF
no factor from 2^68 to 2^69
2019-10-14masserNF-PM1
B1=2617831, B2=26178310, E=12
2019-04-15TJAOINF
no factor from 2^67 to 2^68
2017-08-30Gordon SpenceNF
no factor from 2^66 to 2^67
2017-07-20JossNF-PM1
B1=400000, B2=4000000, E=6
2016-05-23JossNF-PM1
B1=200000, B2=3600000, E=6
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-17ramgeisNF
no factor from 2^65 to 2^66
2015-02-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-18VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-12JossNF-PM1
B1=124518
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-19markrNF
no factor from 2^61 to 2^62
2010-12-12markrNF-PM1
B1=100000, B2=2125000, E=6
2010-11-17JossNF-PM1
B1=20000
2009-02-01Sturle SundeNF
no factor from 2^60 to 2^61