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
13268561Factored
FactorDigitsBitsDate
364956108810709221442812375.02021-08-23 22:05:16
ECM
DigitsB1Curves
25500003 / 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)2002-03-24Howard Porter4FF41F54456A726C7484600
Verified (Factored)2005-02-12Sturle Sunde4FF41F54456A726C11532977
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-06-27firejuggler6AE854607A433EF81625672653
History
DateUserTypeResult
2023-10-30nordiNF-PM1
B1=500000, B2=315199500
2023-10-23nordiNF-PM1
B1=500000
2022-06-27Ben DeloCERT
PRP Certification
Proof certified good
2022-06-27firejugglerC-PRP
M13268561/36495610881070922144281 : 6AE854607A433EF8
PRP proof power = 8
PRP: Verified
Proof certified good
2021-08-31SRBaseNF
no factor from 2^70 to 2^71
2021-08-23ATHF-PP1
Start=2/7, B1=200000, B2=7600000, Factor: 36495610881070922144281
2021-08-07SRBaseNF
no factor from 2^69 to 2^70
2018-01-14ramgeisNF
no factor from 2^68 to 2^69
2017-12-22-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