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

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MnStatusDetails
688447Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
3540526781220411548.3old
2778022860278130326712167.92015-10-02 10:46:00
ECM
DigitsB1Curves
2550000280 / 280
30250000281 / 640
Estimated T-Level: 27.2
TF below 2^85 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver KruseA7F9326A71FCEF952013
Verified2017-09-28Oliver KruseA7F9326A71FCEF952013
Verified2017-11-09kkmrkkblmbrbkA7F9326A71FCEF95259275313
Verified2020-04-20Oliver KruseA2D0C482DC1AC476236501153
Verified2025-03-08kkmrkkblmbrbkA2D0C482DC1AC476255568253
History
DateUserTypeResult
2025-03-08Section 31CERT
PRP Certification
Proof certified good
2025-03-08kkmrkkblmbrbkC-PRP
M688447/354052678122041/277802286027813032671 : A2D0C482DC1AC476
PRP proof power = 6
PRP: Verified
Proof certified good
2024-09-22timc995NF-PM1
B1=1000000, B2=50255955750
2020-04-20Oliver KruseC-PRP
M688447/354052678122041/277802286027813032671 : A2D0C482DC1AC476
PRP: Verified
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M688447/354052678122041/277802286027813032671 : A7F9326A71FCEF95
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M688447/354052678122041/277802286027813032671 : A7F9326A71FCEF95
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M688447/354052678122041/277802286027813032671 : A7F9326A71FCEF95
PRP: Verified
PRP without proof (not generated)
2015-10-02TJAOIF-ECM
Factor: 277802286027813032671 / (ECM curve 32, B1=50000, B2=5000000)