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

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Exponent Range:










MnStatusDetails
1268713Factored
FactorDigitsBitsDate
652211486691169509328201612685.82015-02-16 05:20:27
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David SlowinskiCD00
Verified (Factored)chris lueders608EA569FF9A0CD00
Verified (Factored)2002-08-31Mark Outhier608EA569FF9A0CD0556311
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-29Oliver Kruse9DA46A4A43EE7C801013
Verified2017-10-21kkmrkkblmbrbk9DA46A4A43EE7C80135191313
P-1 factors
DateFactorB1B2
2015-02-166522114866911695093282016141780000
History
DateUserTypeResult
2023-08-15Kevin_9611NF-PM1
B1=5020000, B2=15321308730
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2017-10-21kkmrkkblmbrbkC-PRP
M1268713/65221148669116950932820161 : 9DA46A4A43EE7C80
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1268713/65221148669116950932820161 : 9DA46A4A43EE7C80
PRP: Verified
PRP without proof (not generated)
2015-02-16mikrF-PM1
Factor: 65221148669116950932820161 / (P-1, B1=4178000)
2014-09-30JossNF-PM1
B1=250590
2012-10-13dbaughNF
no factor from 2^62 to 2^63
2012-09-14AxelssonNF
no factor from 2^61 to 2^62
2009-02-16Sturle SundeNF
no factor from 2^60 to 2^61