primes of the form 2^n+5
Jim Nastos
nastos at cs.ualberta.ca
Tue Oct 8 20:09:26 CEST 2002
On Tue, 8 Oct 2002, Christian G. Bower wrote:
> Hans Havermann <hahaj at rogers.com> wrote:
> > > These are the values of n such that 2^n+5 is prime (up to 3000):
> > > 1, 3, 5, 11, 47, 53, 141, 143, 191, 273, 341
> >
> > I believe the next n is 16541.
> >
>
> How are 1 and 3 primes of the form 2^n+5?
Hans isn't saying that. 1 and 3 are the values of n for which
2^n + 5 is prime.
2^1+5 = 7.
2^3+5 = 13.
> Is 1 + (pi/ln(2))i one of the allowed values of n?
We're probably restricting ourselves to *integer* sequences...
--
Jim Nastos, B.Math, B.Ed | Office: 117 Athabasca Hall
MSc Candidate | Office Phone: (780) 492-5046
University Of Alberta | Edmonton, Alberta
Department of Computing Science | T6G 2H1
nastos at cs.ualberta.ca |
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