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
423287Factored
FactorDigitsBitsDate
70639929296891342.7old
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver Kruse31AA436D4FAFFC351013
Verified2017-09-24Oliver Kruse31AA436D4FAFFC351013
Verified2017-11-07kkmrkkblmbrbk31AA436D4FAFFC35119437413
Unverified (Reliable)2020-04-18Oliver Kruse55EC12CFA00EA9__141997553
History
DateUserTypeResult
2020-04-18Oliver KruseC-PRP
M423287/7063992929689 : 55EC12CFA00EA9__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-07kkmrkkblmbrbkC-PRP
M423287/7063992929689 : 31AA436D4FAFFC35
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M423287/7063992929689 : 31AA436D4FAFFC35
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M423287/7063992929689 : 31AA436D4FAFFC35
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=3000000, B2=100000000, E=12