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

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MnStatusDetails
2372437Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
407395420648106831535192375.12016-05-16 18:42:25
ECM
DigitsB1Curves
2550000143 / 280
Estimated T-Level: 22.6 ⓘ
TF below 2^70 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ethan O'Connor79A3A4585F4FD91B0
Verified (Factored)Tom Cage79A3A4585F4FD91B0
Verified (Factored)1999-03-15Ethan O'Connor79A3A4585F4FD91B259107
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-12Oliver Kruse3420854382D10BC51125120653
Verified2017-11-25kkmrkkblmbrbk3420854382D10BC5141924753
History
DateUserTypeResult
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-25kkmrkkblmbrbkC-PRP
M2372437/40739542064810683153519 : 3420854382D10BC5
PRP: Verified
PRP without proof (not generated)
2017-10-12Oliver KruseC-PRP
M2372437/40739542064810683153519 : 3420854382D10BC5
PRP: Verified
PRP without proof (not generated)
2016-05-16lettpF-ECM
Factor: 40739542064810683153519 / (ECM curve 1, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-12mikrNF-PM1
B1=3000000, B2=100000000, E=12
2015-10-30ramgeisNF
no factor from 2^65 to 2^66
2015-03-09VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-09VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-05-31Sebastian HornbostelNF
no factor from 2^61 to 2^62
2009-01-16Sturle SundeNF
no factor from 2^60 to 2^61