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

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MnStatusDetails
2315903Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3700921616768738021308492478.32018-01-01 12:34:22
ECM
DigitsB1Curves
2550000187 / 280
Estimated T-Level: 23.3 ⓘ
TF below 2^73 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert ClarkDC49A776634B78E70
Verified (Factored)1999-03-15David PhillipsDC49A776634B78E71245590
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-01-04Oliver Kruse4F3A7969FE21E6B312837353
Verified2018-01-05kkmrkkblmbrbk4F3A7969FE21E6B31132220353
P-1 factors
DateFactorB1B2
2018-01-013700921616768738021308496000000180000000
History
DateUserTypeResult
2018-02-26alpertronNF-PM1
B1=500000, B2=15000000, E=12
2018-01-05kkmrkkblmbrbkC-PRP
M2315903/370092161676873802130849 : 4F3A7969FE21E6B3
PRP: Verified
PRP without proof (not generated)
2018-01-04Oliver KruseC-PRP
M2315903/370092161676873802130849 : 4F3A7969FE21E6B3
PRP: Verified
PRP without proof (not generated)
2018-01-01Sid & AndyF-PM1
Factor: 370092161676873802130849 / (P-1, B1=6000000, B2=180000000, E=12)
2017-06-03Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-23ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-06Jerry HallettNF
no factor from 2^62 to 2^63
2012-05-24Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-02-18BudNF-PM1
B1=500000, B2=10000000, E=12
2009-01-17Sturle SundeNF
no factor from 2^60 to 2^61