Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
955267Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3408010549211238.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 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
Verified2017-09-28Oliver Kruse45D97DFEBC0DFFE01013
Verified2017-10-15Oliver Kruse45D97DFEBC0DFFE018337113
Verified2017-12-24ATH45D97DFEBC0DFFE0161131813
Verified2020-04-24Oliver KruseD4CBDD175251CEF4151442553
Verified2025-05-25kkmrkkblmbrbkD4CBDD175251CEF4132611053
History
DateUserTypeResult
2025-05-26jkaluzaCERT
PRP Certification
Proof certified good
2025-05-25kkmrkkblmbrbkC-PRP
M955267/340801054921 : D4CBDD175251CEF4
PRP proof power = 6
PRP: Verified
Proof certified good
2020-04-24Oliver KruseC-PRP
M955267/340801054921 : D4CBDD175251CEF4
PRP: Verified
PRP without proof (small exponent)
2017-12-24ATHC-PRP
M955267/340801054921 : 45D97DFEBC0DFFE0
PRP: Verified
PRP without proof (small exponent)
2017-10-15Oliver KruseC-PRP
M955267/340801054921 : 45D97DFEBC0DFFE0
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M955267/340801054921 : 45D97DFEBC0DFFE0
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=200000, B2=5000000, E=6