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

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MnStatusDetails
4853479Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
67604148203615815131962.62010-04-03 01:30:07
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ken Kriesel2BB97AC2CCC26EA00
Verified (Factored)2000-02-23Chris Crawford2BB97AC2CCC26EA04341280
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk8DE3F7601657A7F51013
Verified2018-03-30ATH8DE3F7601657A7F51312763613
History
DateUserTypeResult
2023-04-13Kevin_9611NF-PM1
B1=320000, B2=224341260
2018-03-30ATHC-PRP
M4853479/6760414820361581513 : 8DE3F7601657A7F5
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4853479/6760414820361581513 : 8DE3F7601657A7F5
PRP: Verified
PRP without proof (not generated)
2010-04-03sasaki3F-ECM
Factor: 6760414820361581513
2009-09-07Carsten KossendeyNF-PM1
B1=30000, B2=435000