Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
15181183Factored
FactorDigitsBitsDate
353595146560831973107212374.92023-03-19 17:31:30
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)2002-05-18Hector Yee91428F9713A567EA9912748
Verified (Factored)2005-12-19Ars Technica Team Prime Rib91428F9713A567EA11791306
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-27Perig970EFEBB3DB7210B1635309653
History
DateUserTypeResult
2023-11-04nordiNF-PM1
B1=480000, B2=449768550
2023-10-22nordiNF-PM1
B1=480000
2023-06-27slandrumCERT
PRP Certification
Proof certified good
2023-06-27PerigC-PRP
M15181183/35359514656083197310721 : 970EFEBB3DB7210B
PRP proof power = 8
PRP: Verified
Proof certified good
2023-03-19ATHF-PP1
Start=2/7, B1=1000000, B2=29000000, Factor: 35359514656083197310721
2021-10-09-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-02ChuckNF
no factor from 2^70 to 2^71
2021-07-03lycornNF
no factor from 2^69 to 2^70
2017-12-27ramgeisNF
no factor from 2^68 to 2^69
2017-12-27ramgeisNF
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