Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
391451Factored
FactorDigitsBitsDate
4452235357609514741085372732788.52017-01-19 08:19:45
ECM
DigitsB1Curves
2550000280 / 280
30250000206 / 640
Estimated T-Level: 26.6
TF below 2^83 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David SlowinskiDB10
Verified (Factored)Hal MurrayA5263BA430108DB10
Verified (Factored)Matt HorbalA5263BA430108DB10
Verified (Factored)Eivind TrielA5263BA430108DB132150
Verified (Factored)2016-06-01MadPooA5263BA430108DB1315746
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver KruseDF786D0DD518C0381013
Verified2017-11-02kkmrkkblmbrbkDF786D0DD518C038115073213
Unverified (Reliable)2020-04-18Oliver Kruse57521022C22199__138214453
P-1 factors
DateFactorB1B2
2017-01-19445223535760951474108537273600000003000000000
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M391451/445223535760951474108537273 : 57521022C22199__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-02kkmrkkblmbrbkC-PRP
M391451/445223535760951474108537273 : DF786D0DD518C038
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M391451/445223535760951474108537273 : DF786D0DD518C038
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-01-19mikrF-PM1
Factor: 445223535760951474108537273 / (P-1, B1=60000000, B2=3000000000, E=12)
2016-06-01MadPooC-LL
A5263BA430108DB1
2015-11-18Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-18Gordon SpenceNF
no factor from 2^62 to 2^63
2015-08-13NRNF
no factor from 2^61 to 2^62
2012-07-09alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-02-28monstNF
no factor from 2^60 to 2^61
2009-01-16Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-06Sturle SundeNF
no factor from 2^58 to 2^59