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

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Exponent Range:










MnStatusDetails
1116223Factored
FactorDigitsBitsDate
27874421784272155931961.32011-05-09 14:44:55
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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)David Slowinski177B0
Verified (Factored)Anneke M.Th. Harbers50DC6CDCC7DE377B0
Verified (Factored)2000-12-21Brian J. Beesley50DC6CDCC7DE377B829252
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-29Oliver Kruse5E571627AE46BEBC1013
Verified2017-10-16Oliver Kruse5E571627AE46BEBC190799813
Verified2018-01-02ATH5E571627AE46BEBC128527113
History
DateUserTypeResult
2022-04-12LordJuliusNF
no factor from 2^63 to 2^64
2022-04-12LordJuliusNF
no factor from 2^62 to 2^63
2022-04-12LordJuliusNF
no factor from 2^1 to 2^61
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2018-01-02ATHC-PRP
M1116223/2787442178427215593 : 5E571627AE46BEBC
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1116223/2787442178427215593 : 5E571627AE46BEBC
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1116223/2787442178427215593 : 5E571627AE46BEBC
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12
2011-05-09XyzzyF-ECM
Factor: 2787442178427215593
2009-02-18Sturle SundeNF
no factor from 2^60 to 2^61