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
3288889Factored
FactorDigitsBitsDate
330725473918551069990029533837731101.42021-04-18 18:06:37
ECM
DigitsB1Curves
255000035 / 280
Estimated T-Level: 20.6 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Bob Durbeck39348E32A08ABDDD0
Verified (Factored)1999-07-27Alexander Zimmermann39348E32A08ABDDD262450
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-04-19mikrE591D3A409C77FE0167064453
Verified2021-04-25Chang Chia-TcheE591D3A409C77FE01120166453
P-1 factors
DateFactorB1B2
2021-04-1833072547391855106999002953383774000000150000000
History
DateUserTypeResult
2022-09-03JossNF-PM1
B1=1315555, B2=236513550
2022-03-19JossNF-PM1
B1=1000000, B2=134316000
2021-04-25curtiscCERT
PRP Certification
Proof certified good
2021-04-25Chang Chia-TcheC-PRP
M3288889/3307254739185510699900295338377 : E591D3A409C77FE0
PRP proof power = 7
PRP: Verified
Proof certified good
2021-04-19FlaJunkieCERT
PRP Certification
Proof certified good
2021-04-19mikrC-PRP
M3288889/3307254739185510699900295338377 : E591D3A409C77FE0
PRP proof power = 7
PRP: Verified
Proof certified good
2021-04-18mikrF-PM1
Factor: 3307254739185510699900295338377 / (P-1, B1=4000000, B2=150000000, E=12)
2018-11-19TJAOINF
no factor from 2^67 to 2^68
2017-04-07Gordon SpenceNF
no factor from 2^66 to 2^67
2016-01-28JossNF-PM1
B1=383400, B2=3834000, E=6
2015-06-29ThaNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-10JossNF-PM1
B1=99030
2014-06-26-Anonymous-NF-PM1
B1=79515
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2011-09-25markrNF
no factor from 2^61 to 2^62
2011-09-24USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-07-09Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-02S485122NF
no factor from 2^60 to 2^61