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
262901Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
502771872411135.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000195 / 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 KruseE4423D9A24A5A6B71013
Verified2017-10-12Oliver KruseE4423D9A24A5A6B7123935913
Verified2017-11-06kkmrkkblmbrbkE4423D9A24A5A6B71930713
Verified2020-04-17Oliver Kruse5EB11096E3E14A1C124292553
Verified2024-07-30kkmrkkblmbrbk5EB11096E3E14A1C19474653
History
DateUserTypeResult
2024-10-14yuriy5-1NF-PM1
B1=52580200, B2=5292799722210
2024-07-30ChuckCERT
PRP Certification
Proof certified good
2024-07-30kkmrkkblmbrbkC-PRP
M262901/50277187241 : 5EB11096E3E14A1C
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-05JossNF-PM1
B1=1000000, B2=11098637550
2022-01-03Lisander ViaeneNF-PM1
B1=100000
2020-04-17Oliver KruseC-PRP
M262901/50277187241 : 5EB11096E3E14A1C
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M262901/50277187241 : E4423D9A24A5A6B7
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M262901/50277187241 : E4423D9A24A5A6B7
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M262901/50277187241 : E4423D9A24A5A6B7
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M262901/50277187241 : E4423D9A24A5A6B7
PRP without proof (not generated)