[seqfan] Re: Do 20 and 105 eventually reach a prime in these sequences?

[Sean A. Irvine]

Now,

20: 70: 3.17.198017.3285095068588272249930010330554514950930376377810013896292472350064263809515133313178401608733229

105: 74: 1961223343283007977269148461752720337251322735346597637197693343546947553268679643455766348111262122990126068061056861609

Still no prime. Hard parts added to factordb.

This seems to be a simple variation on the home prime problem, for which 49
has proved notoriously difficult.

See: https://oeis.org/A037271

Sean.


D. S. McNeil wrote:
>> Do 20 and 105 reach a prime under this process?
> 
> FWIW I don't find any up to
> 
> 20: 66 : 3419109323891020477115896140916537885982151410998909473170793231304944883538825046949845010887437337
> 
> or
> 
> 105 : 65 : 3131512266972245513291282626262611938969770072299886730541414876607406495284609846758514357165159433
> 
> Factorizations to these steps filed with factordb.
> 
> 
> Doug
> 
> _______________________________________________
> 
> Seqfan Mailing list - http://list.seqfan.eu/
>