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
263621Factored
FactorDigitsBitsDate
3668954498637470711858.32007-09-05 01:20:00
ECM
DigitsB1Curves
2550000280 / 280
30250000410 / 640
Estimated T-Level: 28.2 ⓘ
TF below 2^89 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver Kruse953AF6F3B4EA0B9B1013
Verified2017-10-12kkmrkkblmbrbk953AF6F3B4EA0B9B15982113
Unverified (Reliable)2020-04-17Oliver Kruse354A48B7127C09__112978253
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M263621/366895449863747071 : 354A48B7127C09__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M263621/366895449863747071 : 953AF6F3B4EA0B9B
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M263621/366895449863747071 : 953AF6F3B4EA0B9B
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M263621/366895449863747071 : 953AF6F3B4EA0B9B
PRP without proof (not generated)
2007-09-05Chad DavisF-ECM
Factor: 366895449863747071