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

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MnStatusDetails
26297Composite, with 6 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
999287619.9old
56380769825.72008-08-26 19:59:14
659354147931135.92008-08-26 19:59:14
8564023701210731549.62008-08-29 02:24:45
967057304719214550455189747507915334112.92023-05-07 12:01:25
266198720321185586475706898851081038101665803254155226355180.82023-04-05 20:26:42
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001901 / 9201
Estimated T-Level: 41.0 ⓘ
TF below 2^131 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse8B8533905AFB43A04013
Verified (Factored)2017-10-02kkmrkkblmbrbk8B8533905AFB43A04013
Verified (Factored)2017-12-07ATH8B8533905AFB43A041770213
Verified (Factored)2020-04-17Oliver Kruse545DBEC10BBF1CA74213453
Verified (Factored)2023-04-06Catherine Cowie545DBEC10BBF1CA75218953
Verified (Factored)2023-04-06Kevin_9611545DBEC10BBF1CA751991053
Verified2023-05-07Naegi Makoto545DBEC10BBF1CA76284753
Verified2023-05-07retsu545DBEC10BBF1CA761631953
P-1 factors
DateFactorB1B2
2023-04-05266198720321185586475706898851081038101665803254155226350000000001516930270635780
History
DateUserTypeResult
2024-11-27masserNF-PP1
Start=6/5, B1=100000000, B2=99900000000
2024-11-21masserNF-PP1
Start=2/7, B1=100000000, B2=99900000000
2024-11-07masserNF-PP1
Start=178/67, B1=100000000, B2=99900000000
2023-05-07retsuC-PRP
M26297/999287/56380769/65935414793/856402370121073/2661987203211855864757068988510810381016658032541552263/9670573047192145504551897475079153 : 545DBEC10BBF1CA7
PRP: Verified
PRP without proof (small exponent)
2023-05-07Naegi MakotoC-PRP
M26297/999287/56380769/65935414793/856402370121073/2661987203211855864757068988510810381016658032541552263/9670573047192145504551897475079153 : 545DBEC10BBF1CA7
PRP: Verified
PRP without proof (small exponent)
2023-05-07Naegi MakotoF-ECM
Factor: 9670573047192145504551897475079153 / (ECM curve 128, B1=3000000, B2=13783619850, Sigma=2086170675594048)
2023-04-06Kevin_9611C-PRP
M26297/999287/56380769/65935414793/856402370121073/2661987203211855864757068988510810381016658032541552263 : 545DBEC10BBF1CA7
PRP: Verified
PRP without proof (small exponent)
2023-04-06Catherine CowieC-PRP
M26297/999287/56380769/65935414793/856402370121073/2661987203211855864757068988510810381016658032541552263 : 545DBEC10BBF1CA7
PRP: Verified
PRP without proof (small exponent)
2023-04-05nordiF-PM1
Factor: 2661987203211855864757068988510810381016658032541552263 / (P-1, B1=5000000000, B2=1516930270635780)
2023-03-10nordiNF-PM1
B1=5000000000
2020-04-17Oliver KruseC-PRP
M26297/999287/56380769/65935414793/856402370121073 : 545DBEC10BBF1CA7
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M26297/999287/56380769/65935414793/856402370121073 : 8B8533905AFB43A0
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M26297/999287/56380769/65935414793/856402370121073 : 8B8533905AFB43A0
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M26297/999287/56380769/65935414793/856402370121073 : 8B8533905AFB43A0
PRP without proof (not generated)
2016-12-15kkmrkkblmbrbkNF-PM1
B1=500000000, B2=10000000000, E=12
2008-08-29-Anonymous-F
Factor: 856402370121073
2008-08-26-Anonymous-F
Factor: 65935414793
2008-08-26-Anonymous-F
Factor: 56380769