
View Poll Results: Need for a Fermat numbers factorization thread?  
Yes, absolutely!  14  66.67%  
Not much, thanks  4  19.05%  
Too many factoring threads around...  2  9.52%  
Who is Fermat?  1  4.76%  
Voters: 21. You may not vote on this poll 

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20080123, 23:44  #1 
Banned
"Luigi"
Aug 2002
Team Italia
11353_{8} Posts 
Fermat numbers factorization
I feel the lack of a specialized thread dealing with Fermat numbers and their factorization. I often dig into the forum threads to find out information and ideas. So I'd like to test your interest in the subject, and eventually propose the opening of a new factoring thread...
Luigi 
20080123, 23:49  #2 
Mar 2006
Germany
3×23×43 Posts 
you know these:
http://www.prothsearch.net/fermat.html http://www.fermatsearch.org/index.html (quite actual, see here: http://www.fermatsearch.org/news.html) http://www.prothsearch.net/status.html just another one: http://v5www.mersenne.org/report_ECM/ Last fiddled with by kar_bon on 20080123 at 23:52 
20080123, 23:56  #3  
Banned
"Luigi"
Aug 2002
Team Italia
29·167 Posts 
Quote:
Neither Fermatsearch nor Prothsearch have a discussion forum, FermatNumbers mailing list seems like dead, and this is one of the reasons why I proposed the thread here Mersenneforum has the best minds involved in number theory and number crunching, so to me it seemed a good place to start building a forum without spreading people over the net. Luigi 

20080124, 01:36  #4 
Dec 2007
100010_{2} Posts 
FermatSearch had a Yahoo group for awhile. But nobody was interested and it died a silent death.
There's not many of us that do Fermat factoring. And of the ones that do, we tend to know what we're doing. 
20080124, 13:02  #5 
"Mark"
Apr 2003
Between here and the
15034_{8} Posts 
The FermatSearch website is alive once again. Hopefully it will stay around for a while.

20080124, 14:23  #6 
Oct 2004
Austria
100110110010_{2} Posts 
@ET:
Three suggestions for the fermatsearch homepage: The "STATS" link placed near the language links is not so good  it took my some time to find it  I didn't want to change the language and so I didn't take a second look to these links. The stats page (http://www.fermatsearch.org/stats/stats.php) is missing a "Home" link. The testing page (http://www.fermatsearch.org/testing.html) should have two buttons: One which is only calculating the required time, and a second one which actually generates the reservation mail. P.S.: Reserving N=47 (what else with my nickname ) and k=5e13 to 8e13, I have also sent a mail. Last fiddled with by Andi47 on 20080124 at 14:36 Reason: Third suggestion 
20080124, 17:57  #7  
Banned
"Luigi"
Aug 2002
Team Italia
29·167 Posts 
Quote:
I will update the site soon. You are right stats label is misplaced... Luigi 

20080124, 18:02  #8  
Banned
"Luigi"
Aug 2002
Team Italia
29·167 Posts 
Quote:
Mersenneforum gives road to many users, and some of them would be happy to offer their computational power on a "new" distributed project. And it has been tiring (at least for me) to gather information about Fermat factoring in the forum, and had the idea to collect some of the most interesting messages in one place. Luigi 

20080125, 01:39  #9 
"Jason Goatcher"
Mar 2005
3·7·167 Posts 
I apologize if people think I'm lazy, but I was searching that site and couldn't find what I was looking for.
What is the lowest Fermat where no factors are known? Is it conclusively known to be composite, meaning a test has been run on it? (possibly doublechecked, would be nice to know that too). Lastly, is there a web page that lists the status of low Fermat numbers, preferably without the clutter of the actual digits of factors? I'm interested in the numbers from F(5) to F(12), which is the lowest Fermat with more than 1,000 digits. (a nice "round" number for my silly human brain) 
20080125, 03:05  #10 
Dec 2007
2×17 Posts 

20080125, 07:51  #11 
"Jason Goatcher"
Mar 2005
3×7×167 Posts 
Thanks, Jay, that definitely helps. :)

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