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

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MnStatusDetails
1097321Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
8778569723.1old
110083242731133.42008-07-16 09:31:19
625802166311135.92008-07-16 09:31:19
12741279434471340.22008-07-16 09:31:19
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
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01KrieselDB1E9FE7ED5CD083013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver Kruse4292714564344ECA4013
Verified2017-10-16Oliver Kruse4292714564344ECA492116613
Verified2017-12-31ATH4292714564344ECA476524613
History
DateUserTypeResult
2025-09-02TedBCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
DB1E9FE7ED5CD083
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-10-11timc995NF-PM1
B1=2000000, B2=147581083650
2017-12-31ATHC-PRP
M1097321/8778569/11008324273/62580216631/1274127943447 : 4292714564344ECA
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1097321/8778569/11008324273/1274127943447/62580216631 : 4292714564344ECA
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1097321/8778569/11008324273/1274127943447/62580216631 : 4292714564344ECA
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1097321/8778569/11008324273/1274127943447/62580216631 : 4292714564344ECA
PRP without proof (not generated)
2008-07-16J FeitsmaF
Factor: 62580216631
2008-07-16J FeitsmaF
Factor: 1274127943447
2008-07-16J FeitsmaF
Factor: 11008324273