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
500417Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
48040033825.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000350 / 640
Estimated T-Level: 27.7
TF below 2^87 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver KruseCB45B366C0885B3A1013
Verified2017-11-03kkmrkkblmbrbkCB45B366C0885B3A133867713
Verified2020-04-18Oliver Kruse8B4D61164C3978A4122786153
Verified2024-12-04kkmrkkblmbrbk8B4D61164C3978A4149075453
History
DateUserTypeResult
2024-12-04XyzzyCERT
PRP Certification
Proof certified good
2024-12-04kkmrkkblmbrbkC-PRP
M500417/48040033 : 8B4D61164C3978A4
PRP proof power = 6
PRP: Verified
Proof certified good
2021-08-01ViliamFNF-PM1
B1=10000000, B2=1110000000
2020-04-18Oliver KruseC-PRP
M500417/48040033 : 8B4D61164C3978A4
PRP: Verified
PRP without proof (small exponent)
2017-11-03kkmrkkblmbrbkC-PRP
M500417/48040033 : CB45B366C0885B3A
PRP: Verified
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M500417/48040033 : CB45B366C0885B3A
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=1500000, B2=50000000, E=12