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
1461851Factored
FactorDigitsBitsDate
128355220834905715032063.52009-01-24 06:44:01
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)phil kenny68DA620F0D20BA210
Verified (Factored)1999-01-17Philip Heede68DA620F0D20BA21494565
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-01Oliver KruseB5F25A00A7C9A4991013
Verified2017-11-05kkmrkkblmbrbkB5F25A00A7C9A499199866613
History
DateUserTypeResult
2017-11-05kkmrkkblmbrbkC-PRP
M1461851/12835522083490571503 : B5F25A00A7C9A499
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1461851/12835522083490571503 : B5F25A00A7C9A499
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2009-01-24axnF-ECM
Factor: 12835522083490571503