20100802, 04:25  #1 
2·3,373 Posts 
Polynomial selection stage question
Hello.
I'm trying to factor 154 digits number using python driver for GGNFS and MSIEVE. I'm also using GPU version of msieve on GeForce 470 GTX. Unfortunately I can run it only 14 hours in a day. But msieve sets time limit of polynomial selection to 287.50 hours. To move to next stage I should get ".fb" file, that msieve generates at end of polyselection. However I have ran msieve in a while some hours and got "project.dat.p" file with intermediate results. So can I make up own ".fb"file by hands based on best evalue from "project.dat.p" or this privilege given only to msieve? My project.dat.p file: http://paste2.org/p/935980 
20100802, 06:20  #2 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2×3×5×313 Posts 
I had a similar problem.
Here's a possible solution  ProcessExplorer It lets you put your process to sleep for the day and then wake it up when you are leaving for the night. You can also suspend that pesky M$oft dialog "You have not rebooted your computer since the last update: reboot now / reboot later" that jumps out every few minutes and sooner a later gets under your mouse click. 
20100802, 06:25  #3 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2·3·5·313 Posts 
You can also find the best poly so far by doing
grep n alp dat.p  sort +6rg  head 261:# norm 5.449549e015 alpha 6.140948 e 3.020e012 231:# norm 5.088774e015 alpha 5.937988 e 2.892e012 #> that shows that your best polynomial start at line 261 Then do tail +261 dat.p  head and add it to your .poly file 
20100802, 12:10  #4 
Tribal Bullet
Oct 2004
3^{3}·131 Posts 
Slightly offtopic, but this is also controlled by a registry entry that you can edit if you have administrative privileges on the machine. If not, you can always drag the window so that only its title bar is visible on your desktop; the warning is only repeated if you do something to the dialog box, so this will stop it annoying you temporarily.
Last fiddled with by jasonp on 20100802 at 12:11 
20100802, 22:12  #5  
Dec 2008
179 Posts 
Quote:
Last fiddled with by jasonp on 20100802 at 22:20 Reason: that requires admin privileges too :) 

20100802, 22:49  #6 
Jul 2003
So Cal
2·3·347 Posts 
Should I worry about "error: size score computation failed" messages? I got two in the last run.
On a 178.6digit number (i.e., log_{10}(N) = 178.6) I found the following polynomial scores after about 5 days x 4 GPUs = 20 GPUdays using Telsa C1060's: # norm 1.307908e17 alpha 8.505804 e 7.968e14 rroots 3 # norm 1.182218e17 alpha 8.638512 e 7.515e14 rroots 3 # norm 1.164100e17 alpha 8.585526 e 7.442e14 rroots 3 # norm 1.252224e17 alpha 8.335315 e 7.438e14 rroots 3 # norm 1.076992e17 alpha 8.016579 e 7.060e14 rroots 3 # norm 1.060567e17 alpha 7.846450 e 6.966e14 rroots 5 # norm 1.065377e17 alpha 7.716075 e 6.936e14 rroots 5 # norm 1.061400e17 alpha 8.249336 e 6.926e14 rroots 5 How do these compare to your expectations? 
20100802, 23:00  #7 
Tribal Bullet
Oct 2004
3^{3}×131 Posts 
I've gone to a lot of trouble to get rid of those errors, but I guess they still crop up very rarely. It just means the code aborted two polynomials because the numerical integrator couldn't converge

20100802, 23:03  #8 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2×3×5×313 Posts 
Ah, the famous "crap" got a new name?

20100802, 23:07  #9  
Jul 2003
So Cal
2·3·347 Posts 
Quote:
17400 16121870647111176931 74778552341263563683890185954076125 The full errors were integrator failed 2.031708e21 6.429909e25 error: size score computation failed integrator failed 8.527355e23 6.756194e25 error: size score computation failed 

20100802, 23:09  #10 
Tribal Bullet
Oct 2004
110111010001_{2} Posts 
This annoyance predates the GPU code; actually I hope one of jrk's patches removed the crap for good.
Greg: thanks, I'll try to find out what exploded here. Actually this is the first report of an integration error in a long time. 
20100802, 23:14  #11  
May 2008
10001000111_{2} Posts 
Quote:


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