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
1422721Factored
FactorDigitsBitsDate
65445167826.0old
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.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30Oliver Kruse455EC4089B4C1B661013
Verified2017-10-26kkmrkkblmbrbk455EC4089B4C1B66191073113
History
DateUserTypeResult
2017-10-26kkmrkkblmbrbkC-PRP
M1422721/65445167 : 455EC4089B4C1B66
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1422721/65445167 : 455EC4089B4C1B66
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12