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

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MnStatusDetails
4252327Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2120231702114629519512167.52009-12-07 11:07:02
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-07-11John MacPherson2BE0EB21084FBBCF0
Verified (Factored)2000-02-16Clas Mayer2BE0EB21084FBBCF2815870
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbkBF9236740B2485171013
Verified2018-01-26Oliver KruseBF9236740B2485171254565613
History
DateUserTypeResult
2023-03-09USAFSSNF-PM1
B1=224000, B2=119776800
2018-01-26Oliver KruseC-PRP
M4252327/212023170211462951951 : BF9236740B248517
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4252327/212023170211462951951 : BF9236740B248517
PRP: Verified
PRP without proof (not generated)
2009-12-07Net_ForceF-ECM
Factor: 212023170211462951951
2009-08-14Carsten KossendeyNF-PM1
B1=25000, B2=337500