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
13276891Factored
FactorDigitsBitsDate
27562043676137147162412271.22021-08-19 21:43:25
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-01-15Carsten Straaberg9F811861A2CD60CB7221906
Verified (Factored)2005-02-12Sturle Sunde9F811861A2CD60CB9652412
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-06-29Poao4716022E5EB14F4911158832853
History
DateUserTypeResult
2023-10-30nordiNF-PM1
B1=500000, B2=315199500
2023-10-23nordiNF-PM1
B1=500000
2022-06-29cswigerCERT
PRP Certification
Proof certified good
2022-06-29PoaoC-PRP
M13276891/2756204367613714716241 : 4716022E5EB14F49
PRP proof power = 8
PRP: Verified
Proof certified good
2021-08-19ATHF-PP1
Start=2/7, B1=200000, Factor: 2756204367613714716241
2021-08-08SRBaseNF
no factor from 2^69 to 2^70
2018-01-29ramgeisNF
no factor from 2^68 to 2^69
2017-12-23-Anonymous-NF
no factor from 2^67 to 2^68
2015-07-20NesowaNF
no factor from 2^66 to 2^67
2014-06-01NesowaNF
no factor from 2^65 to 2^66
2013-05-16lycornNF
no factor from 2^64 to 2^65