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

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MnStatusDetails
15161281Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
15302529517959194399988576312175123936116.92023-02-06 12:19:58
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)2002-12-09Choi woo jin sinmok highschool third grade Seoul KoreaA19DE99B320AB7863177682
Verified (Factored)2006-04-28Paolo T. AmodeoA19DE99B320AB786690822
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-05-26DobriDEFC5AF8631899F911181550753
History
DateUserTypeResult
2023-11-05nordiNF-PM1
B1=480000, B2=449768550
2023-10-22nordiNF-PM1
B1=480000
2023-05-27KishCERT
PRP Certification
Proof certified good
2023-05-26DobriC-PRP
M15161281/153025295179591943999885763121751239 : DEFC5AF8631899F9
PRP proof power = 8
PRP: Verified
Proof certified good
2023-02-06ATHF-PP1
Start=2/7, B1=1000000, B2=29000000, Factor: 153025295179591943999885763121751239
2021-10-15-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-02SRBaseNF
no factor from 2^70 to 2^71
2021-07-01lycornNF
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
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-05-14NesowaNF
no factor from 2^66 to 2^67