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
1865917Factored
FactorDigitsBitsDate
85832183826.4old
85479801972178102547212272.92021-07-15 18:32:43
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
Verified (Factored)2017-10-04Oliver Kruse67090452F6C18C461013
Verified (Factored)2017-11-11kkmrkkblmbrbk67090452F6C18C46178512313
Verified2021-07-16/r/counting8D87369999C68791214441853
History
DateUserTypeResult
2021-07-16Ben DeloCERT
PRP Certification
Proof certified good
2021-07-16/r/countingC-PRP
M1865917/85832183/8547980197217810254721 : 8D87369999C68791
PRP proof power = 7
PRP: Verified
Proof certified good
2021-07-15_p95holder_F-ECM
Factor: 8547980197217810254721 / (ECM curve 6, B1=50000, B2=5000000)
2017-11-11kkmrkkblmbrbkC-PRP
M1865917/85832183 : 67090452F6C18C46
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1865917/85832183 : 67090452F6C18C46
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12