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

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MnStatusDetails
349331Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
263255841611134.6old
126805615511327385524100412683.42016-11-15 10:04:25
ECM
DigitsB1Curves
2550000280 / 280
30250000540 / 640
Estimated T-Level: 29.2
TF below 2^92 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver KruseE2A0D3DD795501522013
Verified2017-10-13Oliver KruseE2A0D3DD7955015227175313
Verified2017-12-13ATHE2A0D3DD79550152221376513
Verified2020-04-18Oliver Kruse00FE4AB2BDC9FE63233114053
Verified2024-09-15kkmrkkblmbrbk00FE4AB2BDC9FE6322673953
P-1 factors
DateFactorB1B2
2016-11-151268056155113273855241004150000000
History
DateUserTypeResult
2024-10-09timc995NF-PM1
B1=6500000, B2=789325547010
2024-09-15KishCERT
PRP Certification
Proof certified good
2024-09-15kkmrkkblmbrbkC-PRP
M349331/26325584161/12680561551132738552410041 : 00FE4AB2BDC9FE63
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-18Oliver KruseC-PRP
M349331/26325584161/12680561551132738552410041 : 00FE4AB2BDC9FE63
PRP: Verified
PRP without proof (small exponent)
2017-12-13ATHC-PRP
M349331/26325584161/12680561551132738552410041 : E2A0D3DD79550152
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M349331/26325584161/12680561551132738552410041 : E2A0D3DD79550152
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M349331/26325584161/12680561551132738552410041 : E2A0D3DD79550152
PRP: Verified
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M349331/26325584161/12680561551132738552410041 : E2A0D3DD79550152
PRP without proof (not generated)
2016-11-15kkmrkkblmbrbkF-PM1
Factor: 12680561551132738552410041 / (P-1, B1=5000000)