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
15015967Factored
FactorDigitsBitsDate
40800708385219203866781432581.82022-03-03 20:37:33
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)2002-04-28John Lloyd-Jones30B4290ED616483A4806391
Verified (Factored)2005-09-22Steven M. Noonan30B4290ED616483A10058909
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-02Dobri6E21F9485DFB9A1911109033353
History
DateUserTypeResult
2023-06-02Martin ChristensenCERT
PRP Certification
Proof certified good
2023-06-02DobriC-PRP
M15015967/4080070838521920386678143 : 6E21F9485DFB9A19
PRP proof power = 8
PRP: Verified
Proof certified good
2022-03-03ATHF-PP1
Start=2/7, B1=1000000, B2=29000000, Factor: 4080070838521920386678143
2021-10-15-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-02SRBaseNF
no factor from 2^70 to 2^71
2020-06-07YxinityNF
no factor from 2^69 to 2^70
2018-01-03riccardo ubertiNF-PM1
B1=430000, B2=9000000, E=12
2017-09-30ramgeisNF
no factor from 2^68 to 2^69
2015-11-03mikrNF
no factor from 2^67 to 2^68
2014-06-11NesowaNF
no factor from 2^66 to 2^67
2014-06-11NesowaNF
no factor from 2^65 to 2^66