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

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MnStatusDetails
353867Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
13042490173691340.2old
2027475764034257939037672477.42015-02-13 11:26:39
ECM
DigitsB1Curves
2550000280 / 280
30250000406 / 640
Estimated T-Level: 28.2
TF below 2^89 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-24Oliver Kruse6BCF42F76825D98E2013
Verified2017-10-13Oliver Kruse6BCF42F76825D98E224091113
Verified2017-12-15ATH6BCF42F76825D98E216677913
Verified2020-04-18Oliver KruseD9DAAE67EB2BDF5F234975653
Verified2024-09-17kkmrkkblmbrbkD9DAAE67EB2BDF5F224073353
History
DateUserTypeResult
2024-09-17LOBESCERT
PRP Certification
Proof certified good
2024-09-17kkmrkkblmbrbkC-PRP
M353867/1304249017369/202747576403425793903767 : D9DAAE67EB2BDF5F
PRP proof power = 5
PRP: Verified
Proof certified good
2024-09-16yuriy_5-1NF-PM1
B1=12000002, B2=1719523505700
2023-12-03USAFSSNF-PM1
B1=1530000, B2=5367308100
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-18Oliver KruseC-PRP
M353867/1304249017369/202747576403425793903767 : D9DAAE67EB2BDF5F
PRP: Verified
PRP without proof (small exponent)
2017-12-15ATHC-PRP
M353867/1304249017369/202747576403425793903767 : 6BCF42F76825D98E
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M353867/1304249017369/202747576403425793903767 : 6BCF42F76825D98E
PRP: Verified
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M353867/1304249017369/202747576403425793903767 : 6BCF42F76825D98E
PRP: Verified
PRP without proof (not generated)
2017-09-23Oliver KruseC-PRP
M353867/1304249017369/202747576403425793903767 : 6BCF42F76825D98E
PRP without proof (not generated)
2015-02-13TJAOIF-ECM
Factor: 202747576403425793903767 / (ECM curve 7, B1=50000, B2=5000000)