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
1771717Factored
FactorDigitsBitsDate
78096063852743480032190472582.72015-05-15 13:15:58
6844548107669861461519044492789.12015-05-15 13:15:58
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)Kevin PostlewaiteAA6F2B4261A5DE0D0
Verified (Factored)1998-11-28Peter RammAA6F2B4261A5DE0D197126
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver Kruse827526C4846FD5682013
Verified2017-11-10kkmrkkblmbrbk827526C4846FD5682166597513
P-1 factors
DateFactorB1B2
2015-05-155345322660597600564822049485279823999586101560840103247540086660000
History
DateUserTypeResult
2017-11-10kkmrkkblmbrbkC-PRP
M1771717/7809606385274348003219047/684454810766986146151904449 : 827526C4846FD568
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1771717/7809606385274348003219047/684454810766986146151904449 : 827526C4846FD568
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1771717/7809606385274348003219047/684454810766986146151904449 : 827526C4846FD568
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-05-15mikrF-PM1
Factor: 5345322660597600564822049485279823999586101560840103 / (P-1, B1=2475400, B2=86660000, E=12)
2015-05-01snme2pm1NF
no factor from 2^64 to 2^65
2015-05-01snme2pm1NF
no factor from 2^63 to 2^64
2014-09-18JossNF-PM1
B1=172454
2014-05-09JossNF-PM1
B1=136227
2014-04-08JossNF-PM1
B1=100000
2011-02-07Carsten KossendeyNF-PM1
B1=95000, B2=1615000, E=6
2010-12-13GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-20Architects CubedNF
no factor from 2^60 to 2^61