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

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MnStatusDetails
76487Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
7954649722.9old
29371009824.82008-08-26 20:09:30
1361236079531237.02008-08-26 20:09:30
20322630587636143599112270.82008-08-26 20:09:30
586203883178635995144088399692995.62017-02-07 18:15:57
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000539 / 4588
Estimated T-Level: 35.6
TF below 2^113 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse5C0FA8E4B8BDF87B5013
Verified2017-10-02kkmrkkblmbrbk5C0FA8E4B8BDF87B5013
Verified2017-12-07ATH5C0FA8E4B8BDF87B56225813
Verified2020-04-17Oliver Kruse965AC0F4EB47EB5954347153
Verified2024-02-03Wentao Huang965AC0F4EB47EB5952146953
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M76487/7954649/29371009/136123607953/2032263058763614359911/58620388317863599514408839969 : 965AC0F4EB47EB59
PRP: Verified
PRP without proof (small exponent)
2024-02-02masserNF-PP1
Start=176/19, B1=25000000, B2=1775000000
2024-01-31masserNF-PP1
Start=6/5, B1=25000000, B2=1775000000
2024-01-31masserNF-PP1
Start=2/7, B1=25000000, B2=1775000000
2022-03-10George WoltmanNF-PM1
B1=1600000000, B2=32068511144670
2020-04-17Oliver KruseC-PRP
M76487/7954649/29371009/136123607953/2032263058763614359911/58620388317863599514408839969 : 965AC0F4EB47EB59
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M76487/7954649/29371009/136123607953/2032263058763614359911/58620388317863599514408839969 : 5C0FA8E4B8BDF87B
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M76487/7954649/29371009/136123607953/2032263058763614359911/58620388317863599514408839969 : 5C0FA8E4B8BDF87B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M76487/known_factors : 5C0FA8E4B8BDF87B
PRP without proof (not generated)
2017-02-07kkmrkkblmbrbkF-ECM
Factor: 58620388317863599514408839969 / (ECM curve 424, B1=250000, B2=25000000)
2016-12-12kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2008-08-26-Anonymous-F-ECM
Factor: 2032263058763614359911
2008-08-26-Anonymous-F
Factor: 136123607953
2008-08-26-Anonymous-F
Factor: 29371009