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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
254647Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
10899706470411340.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000197 / 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
Verified2017-09-22Oliver KruseB5278C82656B7D7E1013
Verified2017-10-12Oliver KruseB5278C82656B7D7E112316013
Verified2017-11-06kkmrkkblmbrbkB5278C82656B7D7E117752313
Verified2020-04-17Oliver Kruse783D64EFC78887EC16651353
Verified2024-02-03Wentao Huang783D64EFC78887EC119099053
History
DateUserTypeResult
2024-02-03slaurCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M254647/1089970647041 : 783D64EFC78887EC
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-25Oliver KruseNF-PM1
B1=30000000, B2=10149965826000
2021-08-31Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2021-04-22nordiNF-PP1
Start=2/7, B1=10000000, B2=1000000000
2020-04-17Oliver KruseC-PRP
M254647/1089970647041 : 783D64EFC78887EC
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M254647/1089970647041 : B5278C82656B7D7E
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M254647/1089970647041 : B5278C82656B7D7E
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M254647/1089970647041 : B5278C82656B7D7E
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M254647/1089970647041 : B5278C82656B7D7E
PRP without proof (not generated)