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

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MnStatusDetails
4193087Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
16273294584401831650.5old
24705921586105003191961.12016-04-01 11:12:42
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk89380A277D1DE01F2013
Verified2018-01-18Oliver Kruse89380A277D1DE01F212181813
History
DateUserTypeResult
2023-03-04USAFSSNF-PM1
B1=224000, B2=119776800
2018-01-18Oliver KruseC-PRP
M4193087/1627329458440183/2470592158610500319 : 89380A277D1DE01F
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4193087/1627329458440183/2470592158610500319 : 89380A277D1DE01F
PRP: Verified
PRP without proof (not generated)
2016-04-01TJAOIF
Factor: 2470592158610500319 / TF: 61-62