A023394 and the smallest undiscovered Fermat factor

[PFOERTNER, Hugo]

-----Original Message-----
From: David Wilson [mailto:davidwwilson at comcast.net] 
Sent: Friday, July 07, 2006 14:52
To: Max A.; seqfan at ext.jussieu.fr
Subject: Re: A023394 and the smallest undiscovered Fermat factor


When I created A023394, I got my list of Fermat divisors from the web
page 
cited on the sequence, and confirmed completeness up to a(19) using a 
straightforward modular test.

I do not know if anyone maintains an official list of Fermat divisors,
nor 
do I know of any rigorous bounds on the completeness of such a list
beyond 
what I have established for A023394.

------------------------

An up-to-date status of Fermat divisors is maintained on Wilfrid
Keller's page

http://www.prothsearch.net/fermat.html

Hugo