A062679: Something's wrong
Robert G. Wilson v
rgwv at rgwv.com
Fri May 6 20:39:05 CEST 2005
Or how about the sequence "Numbers n which are not prime which have the digit 9 in
its divisors except 1. 1691 is the first such entry.
Bob.
זקיר סעידוב - ד"ר/Zakir Seidov Ph.D. wrote:
> Sorry,
> sure 9 and 81 are not OK, because they have divisors (3, 27) not
> containing 9;
> 1691=89*19 is the least non-prime number in A062679.
> so it's OK with entries and name and examples in A062679
> (and Neil,
> I guess I may send my sequence "primes with maximal digit = 9"
> with comment: "first differs from A062679 in 1691, or smth like").
>
> -----Original Message-----
> From: Michele Dondi [mailto:blazar at pcteor1.mi.infn.it]
> Sent: Fri 5/6/2005 4:51 PM
> To: זקיר סעידוב - ד"ר/Zakir Seidov Ph.D.
> Cc: seqfan at ext.jussieu.fr
> Subject: Re: A062679: Something's wrong
>
> On Fri, 6 May 2005, [utf-8] ~Vק~Yר סע~Y~S~U~Q - ~S\"ר/Zakir
> Seidov Ph.D. wrote:
>
> > something's wrong with A062679:
> > enties are all "primes with maximal digit = 9"
> > (which I wished to submit?!),
> > while name and example say quite other things
> > (why e.g. are 9, 81,... absent?)
>
> Do 9, 81,... happen to be primes?
>
>
> Michele
> --
> >What is the current status of chaos theory? A decade ago it was
> supposed
> >to be The Next Big Thing.
> Yeah, well, that kind of thing is notoriously hard to predict, longterm.
> - Lee Rudolph in sci.math, "Re: Chaos Theory?"
>
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