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

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MnStatusDetails
1474349Factored
FactorDigitsBitsDate
962189791919621947938732376.32017-01-29 18:03:28
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 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)Barry Wiebe37F96AC227F329C50
Verified (Factored)1999-02-14Stephen Wood37F96AC227F329C5511107
Verified (Factored)2015-07-19MadPoo37F96AC227F329C51246832
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-01Oliver Kruse1A2F888FD35C2F6C1013
Verified2017-10-28kkmrkkblmbrbk1A2F888FD35C2F6C1110456413
History
DateUserTypeResult
2017-10-28kkmrkkblmbrbkC-PRP
M1474349/96218979191962194793873 : 1A2F888FD35C2F6C
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1474349/96218979191962194793873 : 1A2F888FD35C2F6C
PRP: Verified
PRP without proof (not generated)
2017-01-29Chang Chia-TcheF-ECM
Factor: 96218979191962194793873 / (ECM curve 1, B1=50000, B2=5000000)
2016-08-27Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-08-25Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-21ramgeisNF
no factor from 2^65 to 2^66
2015-07-19MadPooC-LL
37F96AC227F329C5
2015-04-04snme2pm1NF
no factor from 2^64 to 2^65
2015-04-04snme2pm1NF
no factor from 2^63 to 2^64
2015-02-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2015-02-20JossNF-PM1
B1=431432
2015-02-15JossNF-PM1
B1=392211
2015-01-31JossNF-PM1
B1=356556
2015-01-28JossNF-PM1
B1=324142
2015-01-26JossNF-PM1
B1=294675
2014-11-19JossNF-PM1
B1=243534
2011-04-05GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-11-04Rob_DeeNF-PM1
B1=200000, B2=5000000, E=6
2010-11-03Rob_DeeNF-PM1
B1=200000, B2=4000000, E=6
2010-11-02Rob_DeeNF-PM1
B1=200000, B2=3000000, E=6
2010-11-01Rob_DeeNF-PM1
B1=200000, B2=2000000, E=6
2010-10-31Rob_DeeNF-PM1
B1=200000, B2=1000000, E=6
2010-10-30Rob_DeeNF-PM1
B1=200000, B2=300000
2010-10-29Rob_DeeNF-PM1
B1=100000, B2=200000
2010-05-09Architects CubedNF
no factor from 2^60 to 2^61