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

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MnStatusDetails
298943Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
13460522955317538791960.22009-04-20 17:53:35
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000189 / 1566
Estimated T-Level: 30.6
TF below 2^97 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski63EE0
Verified (Factored)Matt FischerADC2295B70F863EE0
Verified (Factored)Brian J. BeesleyADC2295B70F863EE0
Verified (Factored)Eivind TrielADC2295B70F863EE162501
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-24Oliver Kruse695D050B3937FADE1013
Verified2017-10-12Oliver Kruse695D050B3937FADE17325613
Verified2017-11-06kkmrkkblmbrbk695D050B3937FADE127256013
Verified2020-04-17Oliver Kruse5CF890D42D70987514653853
Verified2024-08-20kkmrkkblmbrbk5CF890D42D709875117166453
History
DateUserTypeResult
2024-12-02yuriy_5-1NF-PM1
B1=27502756, B2=6727006095810
2024-08-20Jon PaceCERT
PRP Certification
Proof certified good
2024-08-20kkmrkkblmbrbkC-PRP
M298943/1346052295531753879 : 5CF890D42D709875
PRP proof power = 5
PRP: Verified
Proof certified good
2023-12-11USAFSSNF-PM1
B1=3750000, B2=21060983580
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2021-04-30nordiNF-PP1
Start=6/5, B1=10000000, B2=500000000
2021-04-23nordiNF-PP1
Start=2/7, B1=10000000, B2=500000000
2020-04-17Oliver KruseC-PRP
M298943/1346052295531753879 : 5CF890D42D709875
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M298943/1346052295531753879 : 695D050B3937FADE
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M298943/1346052295531753879 : 695D050B3937FADE
PRP: Verified
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M298943/1346052295531753879 : 695D050B3937FADE
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M298943/1346052295531753879 : 695D050B3937FADE
PRP without proof (not generated)
2009-04-20Sturle SundeF-ECM
Factor: 1346052295531753879
2009-01-23Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-01Sturle SundeNF
no factor from 2^58 to 2^59