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

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MnStatusDetails
968909Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
36818543825.1old
176341439927.42008-07-16 09:29:30
117334879911133.42008-07-16 09:29:30
494139161220508619841694092685.42017-02-10 13:29:22
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 Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver KruseCEB6AC95DB8C60404013
Verified2017-10-15Oliver KruseCEB6AC95DB8C6040447573813
Verified2017-12-24ATHCEB6AC95DB8C6040411262413
Verified2020-04-24Oliver Kruse014B45CE102DDDD8488123953
Verified2025-05-28kkmrkkblmbrbk014B45CE102DDDD8420387953
History
DateUserTypeResult
2025-05-280xCERT
PRP Certification
Proof certified good
2025-05-28kkmrkkblmbrbkC-PRP
M968909/36818543/176341439/11733487991/49413916122050861984169409 : 014B45CE102DDDD8
PRP proof power = 6
PRP: Verified
Proof certified good
2020-04-24Oliver KruseC-PRP
M968909/36818543/176341439/11733487991/49413916122050861984169409 : 014B45CE102DDDD8
PRP: Verified
PRP without proof (small exponent)
2017-12-24ATHC-PRP
M968909/36818543/176341439/11733487991/49413916122050861984169409 : CEB6AC95DB8C6040
PRP: Verified
PRP without proof (small exponent)
2017-10-15Oliver KruseC-PRP
M968909/36818543/11733487991/176341439/49413916122050861984169409 : CEB6AC95DB8C6040
PRP: Verified
PRP without proof (small exponent)
2017-10-05Oliver KruseC-PRP
M968909/36818543/11733487991/176341439/49413916122050861984169409 : CEB6AC95DB8C6040
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M968909/36818543/11733487991/176341439/49413916122050861984169409 : CEB6AC95DB8C6040
PRP without proof (not generated)
2017-02-10TJAOIF-ECM
Factor: 49413916122050861984169409 / (ECM curve 52, B1=50000, B2=5000000)
2016-03-17alpertronNF-PM1
B1=200000, B2=5000000, E=6
2008-07-16J FeitsmaF
Factor: 176341439
2008-07-16J FeitsmaF
Factor: 11733487991