Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
3191561Factored
FactorDigitsBitsDate
6774207969868731549.3old
42080192679524874129672271.82018-08-23 06:39:42
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-11-01Oliver Kruse3072CD48AC68284D1241879053
Verified (Factored)2017-12-13kkmrkkblmbrbk3072CD48AC68284D1292844953
Verified2018-08-27Oliver Kruse3072CD48AC68284D211452653
History
DateUserTypeResult
2022-09-07JossNF-PM1
B1=1057468, B2=226749600
2022-01-11JossNF-PM1
B1=1057468, B2=119912100
2021-09-27JossNF
no factor from 2^67 to 2^68
2020-08-28JossNF-PM1
B1=319156, B2=3191561, E=6
2020-08-26JossNF-PM1
B1=319156
2018-08-27Oliver KruseC-PRP
M3191561/677420796986873/4208019267952487412967 : 3072CD48AC68284D
PRP: Verified
PRP without proof (not generated)
2018-08-23ATHF-ECM
Factor: 4208019267952487412967 / (ECM curve 2, B1=50000, B2=5000000)
2017-12-13kkmrkkblmbrbkC-PRP
M3191561/677420796986873 : 3072CD48AC68284D
PRP: Verified
PRP without proof (not generated)
2017-11-01Oliver KruseC-PRP
M3191561/677420796986873 : 3072CD48AC68284D
PRP: Verified
PRP without proof (not generated)