20080310, 18:19  #1 
Banned
"Luigi"
Aug 2002
Team Italia
3·1,619 Posts 
New Fermat factor!
I just received this email from Maximilian Pacher:
Code:
Hello! My name is Maximilian Pacher, I am from austria and I have interesting news. After 7 years of searching, I am very happy to find my second Fermatfactor. Now I proudly present my second FermatFactor: 351276975*2^1719+1 is a Factor of F1710!!!! This is the first factor this year if I remember correctly. I have found him on March 9th, 2008 with the three programs "NewPGen", "PRP" and "WinPFGW". The last program wrote this: 351276975*2^1719+1 is a Factor of F1710!!!! (0.032000 seconds) If you have questions, please mail me! With regards, PACHER MAXIMILIAN 
20080310, 18:49  #2 
Oct 2004
Austria
2·17·73 Posts 
Congratulations to Maximilian!!

20080310, 18:53  #3 
"Bob Silverman"
Nov 2003
North of Boston
2^{2}·1,877 Posts 

20080310, 18:59  #4 
Oct 2004
Austria
100110110010_{2} Posts 
Any chance to finish this before the end of the century?
Last fiddled with by Andi47 on 20080310 at 18:59 
20080311, 01:08  #5 
"Bob Silverman"
Nov 2003
North of Boston
2^{2}·1,877 Posts 

20080311, 07:25  #6 
Just call me Henry
"David"
Sep 2007
Liverpool (GMT/BST)
2^{4}·13·29 Posts 

20080311, 11:51  #7 
"Bob Silverman"
Nov 2003
North of Boston
1110101010100_{2} Posts 

20080311, 12:01  #8 
Undefined
"The unspeakable one"
Jun 2006
My evil lair
2·3,343 Posts 

20080311, 12:56  #9  
Bamboozled!
"๐บ๐๐ท๐ท๐ญ"
May 2003
Down not across
2×7^{3}×17 Posts 
Quote:
Proving the cofactor to be prime, on the other hand, would appear to be a nontrivial task given known algorithms and technology. Paul 

20080311, 13:07  #10  
"Bob Silverman"
Nov 2003
North of Boston
2^{2}·1,877 Posts 
Quote:
We can't even test F33, and even the status of the F25 cofactor is unknown. 

20080311, 15:46  #11 
"Nancy"
Aug 2002
Alexandria
4643_{8} Posts 
> even the status of the F25 cofactor is unknown.
This seems to be an entirely curable situation. Alex 
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