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

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MnStatusDetails
663683Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
207069097927.6old
1710457645480071547.32014-02-28 11:52:38
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 Kruse3E3F4E77227B5A562013
Verified2017-09-28Oliver Kruse3E3F4E77227B5A562013
Verified2017-11-09kkmrkkblmbrbk3E3F4E77227B5A56241825413
Verified2020-04-19Oliver KruseBE2E82BF0392B1F6219878753
Verified2025-02-24kkmrkkblmbrbkBE2E82BF0392B1F6224184953
History
DateUserTypeResult
2025-02-24Will KCERT
PRP Certification
Proof certified good
2025-02-24kkmrkkblmbrbkC-PRP
M663683/207069097/171045764548007 : BE2E82BF0392B1F6
PRP proof power = 6
PRP: Verified
Proof certified good
2024-08-23cramsey87NF-PM1
B1=6500000, B2=46153758420
2020-04-19Oliver KruseC-PRP
M663683/207069097/171045764548007 : BE2E82BF0392B1F6
PRP: Verified
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M663683/207069097/171045764548007 : 3E3F4E77227B5A56
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M663683/207069097/171045764548007 : 3E3F4E77227B5A56
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M663683/207069097/171045764548007 : 3E3F4E77227B5A56
PRP: Verified
PRP without proof (not generated)
2014-02-28TJAOIF
Factor: 171045764548007