[seqfan] Re: Conjectured sequences in the OEIS

[Neil Sloane]

Charles: good timing! I just added a parag. to the Conjectural section of
the Style sheet saying that we don't worry about this question. That is, we
don't treat sequences involving probable primes as conjectural.


On Fri, May 23, 2014 at 1:14 PM, Charles Greathouse <
charles.greathouse at case.edu> wrote:

> I'll be honest -- I'm not worried at all about accepting probable-primes in
> the OEIS. The chance that a submitted sequence will contain one or more
> transposed or mistyped digits is probably over 1%, and the chance that a
> logic error caused some terms to be wrong probably exceeds 5%. Editing
> helps reduce the number of problems these cause, but there are undoubtedly
> many errors yet to be found in the OEIS.
>
> By contrast the expected number of errors in our, say, 30 million terms due
> to probable prime tests returning the wrong results is surely less than 1.
>
> Charles Greathouse
> Analyst/Programmer
> Case Western Reserve University
>
>
> On Fri, May 23, 2014 at 12:03 AM, Alonso Del Arte
> <alonso.delarte at gmail.com>wrote:
>
> > Some cases are clearer than others. There are a lot of sequences
> "numbers n
> > such that (c^n - 1)/(c - 1) is prime." Some of them have comments stating
> > that some of the larger terms in the Data field are strong probable
> primes,
> > as opposed to confirmed primes.
> >
> > And then there's A242797, Numbers n such that (45^n - 1)/44 is prime. It
> > seems to me that the first three terms, 19, 53, 167, can be confirmed
> > easily enough, with less than an hour of computer time for each. But 3319
> > seems to require at least a day to confirm.
> >
> > Al
> >
> >
> > On Thu, May 22, 2014 at 2:34 PM, Neil Sloane <njasloane at gmail.com>
> wrote:
> >
> > > Dear Seq Fans,
> > > Max Alekseyev pointed out that we should clarify our policy on
>  sequences
> > > with one or more conjectured terms. In fact, the way we handle such
> > > sequences depends on many factors - we don't have a single rule that
> > covers
> > > everything. Yet we do have rules. I have described the situation as I
> see
> > > it in a new section in the Style Sheet page on the wiki:
> > > *https://oeis.org/wiki/Style_Sheet
> > > <https://oeis.org/wiki/Style_Sheet>*
> > >
> > > *Neil*
> > >
> > > --
> > > Dear Friends, I have now retired from AT&T. New coordinates:
> > >
> > > Neil J. A. Sloane, President, OEIS Foundation
> > > 11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
> > > Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway,
> NJ.
> > > Phone: 732 828 6098; home page: http://NeilSloane.com
> > > Email: njasloane at gmail.com
> > >
> > > _______________________________________________
> > >
> > > Seqfan Mailing list - http://list.seqfan.eu/
> > >
> >
> >
> >
> > --
> > Alonso del Arte
> > Author at SmashWords.com<
> > https://www.smashwords.com/profile/view/AlonsoDelarte>
> > Musician at ReverbNation.com <http://www.reverbnation.com/alonsodelarte>
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>



-- 
Dear Friends, I have now retired from AT&T. New coordinates:

Neil J. A. Sloane, President, OEIS Foundation
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Phone: 732 828 6098; home page: http://NeilSloane.com
Email: njasloane at gmail.com