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

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MnStatusDetails
2378539Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
970443913929.9old
4105162862944805194696392478.42022-11-19 15:10:50
ECM
DigitsB1Curves
2550000152 / 280
Estimated T-Level: 22.7
TF below 2^70 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-12Oliver Kruse927CC30157AA2452195126753
Verified (Factored)2017-11-25ATH927CC30157AA24521166683353
Verified2022-11-20Nesowa927CC30157AA2452293981153
History
DateUserTypeResult
2022-11-20mrk74CERT
PRP Certification
Proof certified good
2022-11-20NesowaC-PRP
M2378539/970443913/410516286294480519469639 : 927CC30157AA2452
PRP proof power = 7
PRP: Verified
Proof certified good
2022-11-19NesowaF-ECM
Factor: 410516286294480519469639 / (ECM curve 6, B1=50000, B2=27023535, Sigma=1125900353167893)
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-25ATHC-PRP
M2378539/970443913 : 927CC30157AA2452
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-12Oliver KruseC-PRP
M2378539/970443913 : 927CC30157AA2452
PRP: Verified (Factored)
PRP without proof (not generated)