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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MnStatusDetails
15162509Factored
FactorDigitsBitsDate
37421208100213605248142012581.62023-02-09 03:17:31
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)2002-04-07Richard Rudell3556B7EE3A22D05F10409661
Verified (Factored)2005-12-24David Todd3556B7EE3A22D05F6344744
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-02DobriAAB43BB2F18C30531823892353
History
DateUserTypeResult
2023-11-05nordiNF-PM1
B1=480000, B2=449768550
2023-10-22nordiNF-PM1
B1=480000
2023-06-02Hestia.oxwil.comCERT
PRP Certification
Proof certified good
2023-06-02DobriC-PRP
M15162509/3742120810021360524814201 : AAB43BB2F18C3053
PRP proof power = 8
PRP: Verified
Proof certified good
2023-02-09ATHF-PP1
Start=2/7, B1=1000000, Factor: 3742120810021360524814201
2021-10-09-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-03SRBaseNF
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
2014-05-14NesowaNF
no factor from 2^66 to 2^67
2014-05-14NesowaNF
no factor from 2^65 to 2^66