Marin Mersenne 2^P-1
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MnStatusDetails
16223063Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
62365616165671203519832272.42022-03-20 16:21:07
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-12-31Del Johnson92C56A554430992012974580
Verified (Factored)2006-03-28Lloyd Miller92C56A554430992014907690
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-02-11Max Dettweiler78BA35FC88780C5017980953
P-1 factors
DateFactorB1B2
2022-03-22623656161656712035198310000002850807960
History
DateUserTypeResult
2024-02-12George WoltmanCERT
PRP Certification
Proof certified good
2024-02-11Max DettweilerC-PRP
M16223063/6236561616567120351983 : 78BA35FC88780C50
PRP proof power = 8
PRP: Verified
Proof certified good
2022-03-22axnF-PM1
Factor: 6236561616567120351983 / (P-1, B1=1000000, B2=2850807960)
2022-03-20TheJudgerF
Factor: 6236561616567120351983 / TF: 72-73
2021-09-22-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-09SRBaseNF
no factor from 2^70 to 2^71
2021-04-25lycornNF
no factor from 2^69 to 2^70
2018-02-10ramgeisNF
no factor from 2^68 to 2^69
2018-02-10ramgeisNF
no factor from 2^67 to 2^68
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-08-08NesowaNF
no factor from 2^66 to 2^67