Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
27128947Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
253812867176867252705512374.42021-01-04 05:07:26
ECM
DigitsB1Curves
25500007 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2008-07-12Sturle Sunde83A6F052F476A16B22040677
Verified (Factored)2011-09-04Dry Creek Photo83A6F052F476A16B23067000
P-1 factors
DateFactorB1B2
2021-01-0425381286717686725270551135000089100000
History
DateUserTypeResult
2021-05-14firejugglerNF-PP1
Start=6/5, B1=500000, B2=23000000
2021-01-04firejugglerF-PM1
Factor: 25381286717686725270551 / (P-1, B1=1350000, B2=89100000)
2018-09-05chuenkitNF
no factor from 2^69 to 2^70
2018-04-09VictordeHollanderNF
no factor from 2^68 to 2^69
2011-09-04Dry Creek PhotoC-LL
83A6F052F476A16B
2011-02-26CommasterNF
no factor from 2^67 to 2^68