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

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MnStatusDetails
1983931Factored
FactorDigitsBitsDate
118287124371423341605132373.32020-01-31 17:09:42
ECM
DigitsB1Curves
2550000272 / 280
Estimated T-Level: 24.9
TF below 2^78 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Al Lovrich22234BCAD3898B8D0
Verified (Factored)2006-02-15S42782722234BCAD3898B8D1242000
Verified (Factored)2007-11-17Michael Petry22234BCAD3898B8D1242000
Verified (Factored)2016-06-02MadPoo22234BCAD3898B8D1882771
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-02-01Niels_Mache_NextcloudFA44C77AB96DDEF21124310653
Verified2020-02-02ANONYMOUSFA44C77AB96DDEF2181538853
Verified2020-02-07GANFA44C77AB96DDEF21144946953
History
DateUserTypeResult
2020-02-07GANC-PRP
M1983931/11828712437142334160513 : FA44C77AB96DDEF2
PRP: Verified
PRP without proof (not generated)
2020-02-02ANONYMOUSC-PRP
M1983931/11828712437142334160513 : FA44C77AB96DDEF2
PRP: Verified
PRP without proof (not generated)
2020-02-01Niels_Mache_NextcloudC-PRP
M1983931/11828712437142334160513 : FA44C77AB96DDEF2
PRP: Verified
PRP without proof (not generated)
2020-01-31daveward2005F-ECM
Factor: 11828712437142334160513 / (ECM curve 1, B1=50000, B2=5000000)
2019-05-18chuenkitNF
no factor from 2^67 to 2^68
2018-11-26JossNF-PM1
B1=1983931, B2=247991375, E=12
2018-05-21JossNF-PM1
B1=1983931, B2=198393100, E=12
2018-03-11JossNF-PM1
B1=1983931, B2=120000000, E=12
2018-02-15JossNF-PM1
B1=1983931, B2=60000000, E=12
2018-01-27JossNF-PM1
B1=1983931, B2=30000000, E=12
2018-01-21JossNF-PM1
B1=1205760
2018-01-08TJAOINF
no factor from 2^66 to 2^67
2016-06-02MadPooC-LL
22234BCAD3898B8D
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-11ramgeisNF
no factor from 2^65 to 2^66
2015-03-13lycornNF
no factor from 2^64 to 2^65
2015-03-13lycornNF
no factor from 2^63 to 2^64
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-01-21kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2009-12-17S485122NF
no factor from 2^60 to 2^61