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

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MnStatusDetails
3304181Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
317201377928.2old
2123927546811237.62008-09-07 19:48:13
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
Verified2017-11-04Oliver Kruse32BF91E8CEBBE5072306652353
Verified2017-12-14kkmrkkblmbrbk32BF91E8CEBBE5072153498053
History
DateUserTypeResult
2022-09-10JossNF-PM1
B1=1000000, B2=241175550
2022-03-10JossNF-PM1
B1=1000000, B2=134343300
2021-10-07JossNF
no factor from 2^67 to 2^68
2021-01-03JossNF-PM1
B1=330418, B2=3304181, E=6
2017-12-14kkmrkkblmbrbkC-PRP
M3304181/317201377/212392754681 : 32BF91E8CEBBE507
PRP: Verified
PRP without proof (not generated)
2017-11-04Oliver KruseC-PRP
M3304181/317201377/212392754681 : 32BF91E8CEBBE507
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 212392754681