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

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MnStatusDetails
249749Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
22656361369377966565192270.9old
68876434503333795419090662332892.52019-12-27 20:51:42
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000196 / 1566
Estimated T-Level: 30.6
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse4D61638E0B9305FA1013
Verified (Factored)2017-10-12Oliver Kruse4D61638E0B9305FA124750113
Verified (Factored)2017-11-06kkmrkkblmbrbk4D61638E0B9305FA13515513
Verified2019-12-28Niels_Mache_NextcloudAABF9CC214CAF02523206753
Verified2019-12-29marssystemsAABF9CC214CAF025214622553
History
DateUserTypeResult
2022-04-18Oliver KruseNF-PM1
B1=30000000, B2=10120247026890
2021-08-11Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2019-12-29marssystemsC-PRP
M249749/2265636136937796656519/6887643450333379541909066233 : AABF9CC214CAF025
PRP: Verified
PRP without proof (small exponent)
2019-12-28Niels_Mache_NextcloudC-PRP
M249749/2265636136937796656519/6887643450333379541909066233 : AABF9CC214CAF025
PRP: Verified
PRP without proof (small exponent)
2019-12-27Niels_Mache_NextcloudF-ECM
Factor: 6887643450333379541909066233 / (ECM curve 3, B1=250000, B2=25000000, Sigma=8635935103438546)
2017-11-06kkmrkkblmbrbkC-PRP
M249749/2265636136937796656519 : 4D61638E0B9305FA
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M249749/2265636136937796656519 : 4D61638E0B9305FA
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M249749/2265636136937796656519 : 4D61638E0B9305FA
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M249749/2265636136937796656519 : 4D61638E0B9305FA
PRP without proof (not generated)