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
4461971Factored
FactorDigitsBitsDate
3188887283339559266813032478.12022-07-18 10:42:54
18191052664495117318703014312890.62022-07-15 00:51:55
ECM
DigitsB1Curves
255000012 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-05-16Jean GallaisCAFB5BB4728D0BF70
Verified (Factored)2001-05-27Robert YoungCAFB5BB4728D0BF73927175
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-07-18xssDAEDD866AF4FF9F42108633653
P-1 factors
DateFactorB1B2
2022-07-15181910526644951173187030143175000007500000
2022-07-18318888728333955926681303750000012441625350
History
DateUserTypeResult
2022-07-18curtiscCERT
PRP Certification
Proof certified good
2022-07-18xssC-PRP
M4461971/1819105266449511731870301431/318888728333955926681303 : DAEDD866AF4FF9F4
PRP proof power = 7
PRP: Verified
Proof certified good
2022-07-18xssF-PM1
Factor: 318888728333955926681303 / (P-1, B1=7500000, B2=12441625350)
2022-07-15xssF-PM1
Factor: 1819105266449511731870301431 / (P-1, B1=7500000)
2021-08-22SRBaseNF
no factor from 2^70 to 2^71
2021-08-18SRBaseNF
no factor from 2^69 to 2^70
2021-07-21MadPooNF
no factor from 2^68 to 2^69
2021-04-24Architects CubedNF-PM1
B1=222000, B2=13864000
2018-06-25ramgeisNF
no factor from 2^67 to 2^68
2018-06-25ramgeisNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-24snme2pm1NF
no factor from 2^65 to 2^66
2014-12-01NesowaNF-PM1
B1=260000, B2=5590000, E=12
2014-09-19monstNF
no factor from 2^64 to 2^65
2014-09-19JayderNF
no factor from 2^63 to 2^64
2014-08-22JossNF-PM1
B1=64385
2012-02-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-07-06USAFSSNF-PM1
B1=50000, B2=812500, E=6
2010-10-09markrNF
no factor from 2^61 to 2^62