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

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Exponent Range:










MnStatusDetails
1927097Factored
FactorDigitsBitsDate
3771119999896488109275432478.32020-03-02 20:14:20
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)tom ehlertAD289B8C39E978760
Verified (Factored)1999-03-26Robert MutschlerAD289B8C39E97876215169
Verified (Factored)2015-07-14MadPooAD289B8C39E97876866096
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-03-02XyzzyF2F0FA8F4DDF3A50126767653
Verified2020-03-04Luigi MorelliF2F0FA8F4DDF3A50182962453
History
DateUserTypeResult
2020-03-04Luigi MorelliC-PRP
M1927097/377111999989648810927543 : F2F0FA8F4DDF3A50
PRP: Verified
PRP without proof (not generated)
2020-03-02XyzzyC-PRP
M1927097/377111999989648810927543 : F2F0FA8F4DDF3A50
PRP: Verified
PRP without proof (not generated)
2020-03-02MarkSF-ECM
Factor: 377111999989648810927543 / (ECM curve 1, B1=50000, B2=5000000, Sigma=6798161986150354)
2019-05-04chuenkitNF
no factor from 2^67 to 2^68
2018-06-19JossNF-PM1
B1=2149908, B2=192709700, E=12
2018-04-02TJAOINF
no factor from 2^66 to 2^67
2018-02-23JossNF-PM1
B1=2149908, B2=85996320, E=12
2018-02-09JossNF-PM1
B1=2149908, B2=42998160, E=12
2017-08-04JossNF-PM1
B1=2149908, B2=21499080, E=12
2017-07-30JossNF-PM1
B1=1791590, B2=17915900, E=12
2017-07-18JossNF-PM1
B1=1492992, B2=14929920, E=12
2017-06-27JossNF-PM1
B1=1244160, B2=22394880, E=12
2017-01-21JossNF-PM1
B1=1036800
2017-01-03JossNF-PM1
B1=864000
2016-09-30JossNF-PM1
B1=600000, B2=33000000, E=6
2016-08-30JossNF-PM1
B1=600000, B2=30000000, E=12
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-08Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2015-09-03ramgeisNF
no factor from 2^65 to 2^66
2015-07-14MadPooC-LL
AD289B8C39E97876
2015-05-17snme2pm1NF
no factor from 2^64 to 2^65
2015-05-17snme2pm1NF
no factor from 2^63 to 2^64
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-02-09S485122NF
no factor from 2^60 to 2^61