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

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MnStatusDetails
664571Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1329143720.3old
391157452434411445.22014-01-15 15:34:32
1366718651973131547.02014-02-21 11:43:58
ECM
DigitsB1Curves
2550000280 / 280
30250000215 / 640
Estimated T-Level: 26.7
TF below 2^84 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver KruseC40DD211D441E86D3013
Verified2017-09-28Oliver KruseC40DD211D441E86D3013
Verified2017-11-09kkmrkkblmbrbkC40DD211D441E86D316603113
Verified2020-04-19Oliver Kruse1A7D1A06769B9752314544553
Verified2025-02-24kkmrkkblmbrbk1A7D1A06769B9752340216653
History
DateUserTypeResult
2025-02-24Jonathan WebbCERT
PRP Certification
Proof certified good
2025-02-24kkmrkkblmbrbkC-PRP
M664571/1329143/39115745243441/136671865197313 : 1A7D1A06769B9752
PRP proof power = 6
PRP: Verified
Proof certified good
2024-08-23cramsey87NF-PM1
B1=6500000, B2=46153758420
2020-04-19Oliver KruseC-PRP
M664571/1329143/39115745243441/136671865197313 : 1A7D1A06769B9752
PRP: Verified
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M664571/1329143/39115745243441/136671865197313 : C40DD211D441E86D
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M664571/1329143/39115745243441/136671865197313 : C40DD211D441E86D
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M664571/1329143/39115745243441/136671865197313 : C40DD211D441E86D
PRP: Verified
PRP without proof (not generated)
2014-02-21TJAOIF
Factor: 136671865197313
2014-01-15TJAOIF
Factor: 39115745243441