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

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MnStatusDetails
4978013Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
102201013759285511753.2old
1363694235133543583032166.92020-11-19 16:25:56
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
Verified (Factored)2017-09-20kkmrkkblmbrbkD06D499F3337C5821013
Verified (Factored)2018-04-20ATHD06D499F3337C5821120332113
Verified2020-11-19mrh21051B81750E8202274799353
History
DateUserTypeResult
2023-12-07USAFSSNF-PM1
B1=256000, B2=105522060
2020-11-19Ben DeloCERT
PRP Certification
Proof certified good
2020-11-19mrhC-PRP
M4978013/10220101375928551/136369423513354358303 : 21051B81750E8202
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-19TJAOIF
Factor: 136369423513354358303 / TF: 66-67
2018-04-20ATHC-PRP
M4978013/10220101375928551 : D06D499F3337C582
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4978013/10220101375928551 : D06D499F3337C582
PRP: Verified (Factored)
PRP without proof (not generated)