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
263533Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
75370439826.2old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000232 / 1566
Estimated T-Level: 30.7
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 Kruse3EBB53B5DF21F69D1013
Verified2017-09-22Oliver Kruse3EBB53B5DF21F69D1013
Verified2017-11-06kkmrkkblmbrbk3EBB53B5DF21F69D124384413
Verified2020-04-17Oliver KruseA134A8B77078910912927753
Verified2024-07-30kkmrkkblmbrbkA134A8B770789109122926753
History
DateUserTypeResult
2024-10-18yuriy_5-1NF-PM1
B1=24245036, B2=5915482552980
2024-07-30infinigonCERT
PRP Certification
Proof certified good
2024-07-30kkmrkkblmbrbkC-PRP
M263533/75370439 : A134A8B770789109
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-20Lisander ViaeneNF-PM1
B1=5550000, B2=151884983250
2022-03-19Lisander ViaeneNF-PM1
B1=5550000
2022-01-03Lisander ViaeneNF-PM1
B1=100000
2020-04-17Oliver KruseC-PRP
M263533/75370439 : A134A8B770789109
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M263533/75370439 : 3EBB53B5DF21F69D
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M263533/75370439 : 3EBB53B5DF21F69D
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M263533/75370439 : 3EBB53B5DF21F69D
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M263533/75370439 : 3EBB53B5DF21F69D
PRP without proof (not generated)