Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
5083957Factored
FactorDigitsBitsDate
12609858247969098888139153672890.02017-07-25 16:12:20
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-06-26Gordon Cross0362EEBBD2CCBFB02073743
Verified (Factored)2000-04-27Brian J. Beesley0362EEBBD2CCBFB01388490
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-28alpertron77884A550CE196611013
Verified2018-01-19kkmrkkblmbrbk77884A550CE19661174867713
P-1 factors
DateFactorB1B2
2017-07-25126098582479690988881391536715000000
History
DateUserTypeResult
2018-01-19kkmrkkblmbrbkC-PRP
M5083957/1260985824796909888813915367 : 77884A550CE19661
PRP: Verified
PRP without proof (not generated)
2017-09-28alpertronC-PRP
M5083957/1260985824796909888813915367 : 77884A550CE19661
PRP: Verified
PRP without proof (not generated)
2017-07-25mikrF-PM1
Factor: 1260985824796909888813915367 / (P-1, B1=1500000)
2016-05-24Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^61
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-08-03snme2pm1NF
no factor from 2^65 to 2^66
2014-09-15monstNF
no factor from 2^64 to 2^65
2014-09-01krackerNF
no factor from 2^63 to 2^64
2009-08-21USAFSSNF-PM1
B1=55000, B2=907500, E=6
2009-07-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2008-12-29Sturle SundeNF
no factor from 2^61 to 2^62