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
1504879Factored
FactorDigitsBitsDate
2043389282633178336172167.52013-07-12 13:48:59
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)Jim MulveyC178F40CB578C0AB0
Verified (Factored)1998-10-18Paul Victor NovareseC178F40CB578C0AB519674
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-01Oliver KruseCC607B44B549978F1013
Verified2017-10-29kkmrkkblmbrbkCC607B44B549978F1145273813
History
DateUserTypeResult
2017-10-29kkmrkkblmbrbkC-PRP
M1504879/204338928263317833617 : CC607B44B549978F
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1504879/204338928263317833617 : CC607B44B549978F
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2013-07-12Chang Chia-TcheF-ECM
Factor: 204338928263317833617
2011-01-26James HeinrichNF-PM1
B1=80000, B2=1280000, E=6
2010-02-24GrunwalderGIMPNF
no factor from 2^1 to 2^63