Marin Mersenne 2^P-1
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MnStatusDetails
620909Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
62656103745213368231962.4old
2359477162955489851749287212787.62022-12-12 12:22:01
ECM
DigitsB1Curves
2550000280 / 280
30250000214 / 640
Estimated T-Level: 26.7 ⓘ
TF below 2^84 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-27Oliver Kruse6EB9B906A4517E511013
Verified (Factored)2017-09-28Oliver Kruse6EB9B906A4517E511013
Verified (Factored)2017-11-08kkmrkkblmbrbk6EB9B906A4517E5113886313
Verified (Factored)2020-04-19Oliver Kruse44C58296C699C57C134595953
Verified2022-12-13LordJulius44C58296C699C57C213778453
P-1 factors
DateFactorB1B2
2023-01-0923594771629554898517492872120000006199753560
History
DateUserTypeResult
2023-01-09USAFSSF-PM1
Factor: 235947716295548985174928721 / (P-1, B1=2000000, B2=6199753560)
2022-12-13John AireyCERT
PRP Certification
Proof certified good
2022-12-13LordJuliusC-PRP
M620909/6265610374521336823/235947716295548985174928721 : 44C58296C699C57C
PRP proof power = 6
PRP: Verified
Proof certified good
2022-12-12TJAOIF-ECM
Factor: 235947716295548985174928721 / (ECM curve 13, B1=250000, B2=40000000)
2020-04-19Oliver KruseC-PRP
M620909/6265610374521336823 : 44C58296C699C57C
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-11-08kkmrkkblmbrbkC-PRP
M620909/6265610374521336823 : 6EB9B906A4517E51
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M620909/6265610374521336823 : 6EB9B906A4517E51
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M620909/6265610374521336823 : 6EB9B906A4517E51
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=1000000, B2=30000000, E=12