Marin Mersenne 2^P-1
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MnStatusDetails
358349Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
12856610947017817191960.22007-12-15 02:51:20
ECM
DigitsB1Curves
2550000280 / 280
30250000425 / 640
Estimated T-Level: 28.3
TF below 2^89 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver Kruse481BC22D3ECB93BF1013
Verified2017-10-13kkmrkkblmbrbk481BC22D3ECB93BF18118013
Verified2020-04-18Oliver Kruse9C7FC426E5AE3986121120853
Verified2024-09-19kkmrkkblmbrbk9C7FC426E5AE3986121469953
History
DateUserTypeResult
2024-09-19willawogaCERT
PRP Certification
Proof certified good
2024-09-19kkmrkkblmbrbkC-PRP
M358349/1285661094701781719 : 9C7FC426E5AE3986
PRP proof power = 5
PRP: Verified
Proof certified good
2024-09-16yuriy5-1NF-PM1
B1=12000002, B2=1719523505700
2023-12-04USAFSSNF-PM1
B1=1530000, B2=7202524560
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M358349/1285661094701781719 : 9C7FC426E5AE3986
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M358349/1285661094701781719 : 481BC22D3ECB93BF
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M358349/1285661094701781719 : 481BC22D3ECB93BF
PRP: Verified
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M358349/1285661094701781719 : 481BC22D3ECB93BF
PRP without proof (not generated)
2007-12-15Steve ScottF-ECM
Factor: 1285661094701781719