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
15106661Factored
FactorDigitsBitsDate
278247651151430689043878872684.52022-02-23 21:17:01
ECM
DigitsB1Curves
255000014 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-07-27Eric Prestemon0A224763DF8F71808329566
Bad2002-09-22Karsten Müller350E466DA4D7361515015488
Verified (Factored)2005-11-13Brian Gaboury0A224763DF8F71806372034
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-01Dobri93926351EE620E481699469953
History
DateUserTypeResult
2023-06-01Stef42CERT
PRP Certification
Proof certified good
2023-06-01DobriC-PRP
M15106661/27824765115143068904387887 : 93926351EE620E48
PRP proof power = 8
PRP: Verified
Proof certified good
2022-02-23ATHF-PP1
Start=2/7, B1=1000000, B2=29000000, Factor: 27824765115143068904387887
2021-10-09-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-08SRBaseNF
no factor from 2^70 to 2^71
2021-06-27lycornNF
no factor from 2^69 to 2^70
2019-03-27USAFSSNF-PM1
B1=360000, B2=9630000, E=12
2017-10-08ramgeisNF
no factor from 2^68 to 2^69
2016-11-18mikrNF
no factor from 2^67 to 2^68
2014-05-14NesowaNF
no factor from 2^66 to 2^67
2014-05-14NesowaNF
no factor from 2^65 to 2^66