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

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MnStatusDetails
11618923Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
9175197524550880725644196394793099.52021-08-21 13:31:08
ECM
DigitsB1Curves
255000088 / 280
Estimated T-Level: 21.6 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-01-21Stephen WoodD45B665FC43D6D493434622
Verified (Factored)2004-06-21Penny Black SD45B665FC43D6D497411756
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-09-28kracker6088554FAB4BBE851453994953
Verified2021-09-29LaurV6088554FAB4BBE851599802253
P-1 factors
DateFactorB1B2
2021-08-2191751975245508807256441963947961891076189107
History
DateUserTypeResult
2025-03-11yuriy_5-1NF-PM1
B1=6971352, B2=448721460
2024-08-21yuriy_5-1NF-PM1
B1=2800000, B2=5499082050
2021-09-29DobriCERT
PRP Certification
Proof certified good
2021-09-29LaurVC-PRP
M11618923/917519752455088072564419639479 : 6088554FAB4BBE85
PRP proof power = 8
PRP: Verified
Proof certified good
2021-09-28krackerC-PRP
M11618923/917519752455088072564419639479 : 6088554FAB4BBE85
PRP: Verified
PRP without proof (not generated)
2021-08-21LaurVF-PM1
Factor: 917519752455088072564419639479 / (P-1, B1=6189107)
2021-08-14SRBaseNF
no factor from 2^70 to 2^71
2021-08-07SRBaseNF
no factor from 2^69 to 2^70
2018-01-07ramgeisNF
no factor from 2^68 to 2^69
2018-01-07ramgeisNF
no factor from 2^67 to 2^68
2016-01-15VictordeHollanderNF
no factor from 2^66 to 2^67
2014-12-20NesowaNF
no factor from 2^65 to 2^66
2013-11-05lycornNF
no factor from 2^64 to 2^65
2012-03-19James HeinrichNF-PM1
B1=225000, B2=5400000, E=6