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
1306589Factored
FactorDigitsBitsDate
48865810835078173191962.12009-07-19 18:48:20
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Larry EnglishA28F28E10A5BF66A0
Verified (Factored)Cornelius CaesarA28F28E10A5BF66A0
Verified (Factored)Brian J. BeesleyA28F28E10A5BF66A287132
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30Oliver Kruse5E1F27C5A66EF9CE1013
Verified2017-10-23kkmrkkblmbrbk5E1F27C5A66EF9CE195463113
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2017-10-23kkmrkkblmbrbkC-PRP
M1306589/4886581083507817319 : 5E1F27C5A66EF9CE
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1306589/4886581083507817319 : 5E1F27C5A66EF9CE
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-07-19SubPrimeF-ECM
Factor: 4886581083507817319
2009-02-17Sturle SundeNF
no factor from 2^60 to 2^61