20120628, 07:23  #1 
Aug 2005
76_{16} Posts 
How to handle ECM results?
I would like to do some ECM work. 100 curves takes a long time and if I quit before all 100 are finished there is no results entry. I can do the modify worktodo trick to next curve and get say 73 curves reported in results. I would like to queue up a string of 10 curve sets in worktodo. This gives me a string of 10 curve sets in results. I don't want to junk up the history for an exponent with scores of ECM entries.
It appears to be very easy to edit the results file and report 100 curves completed instead of 10 sets of 10. If this is true then someone could just as easily report 1000 curves completed. What is considered to be the appropriate way to run say 600 curves on an exponent without nuisance reporting and without committing to a long uncertain voyage of running 600 curves? 
20120628, 09:14  #2  
"Richard B. Woods"
Aug 2002
Wisconsin USA
1E0C_{16} Posts 
Quote:
If this "junk up" ever became a real problem, that could easily be handled on the server side, such as by appropriately combining reports on a line. You needn't make that your worry. Quote:
Quote:
There's no magic trick to be "appropriate", other than what you already know, except to relax and let the computers deal with the big numbers, like 600, while you attend to just 10 at a time. :) (Think of it as a "divide and conquer" strategy, just as is used in many mathematical algorithms.) 

20121109, 00:43  #3 
Aug 2005
2·59 Posts 
Is there a slick way to identify exponents with extensive histories. Some, such as 1277, are very well deserved. I remember stumbling across a much larger one that seemed to have been caused by a reporting loop bug or something. I'd like to find it again and squash it with a factor.

20121109, 03:42  #4 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
25DE_{16} Posts 
http://www.mersenne.org/report_ECM/
Scroll to see the whole page. 
20121109, 04:24  #5 
Aug 2005
2×59 Posts 
That is a good site to find exponents that have had a lot of curves run. I am looking for ones that have had like 500 curves run, but that were submitted one at a time. Resulting in 500 history lines rather than one.

20121109, 07:11  #6 
"Åke Tilander"
Apr 2011
Sandviken, Sweden
1000110110_{2} Posts 
I would say that I think that you never ever should edit a results file, or rather the content of each resultline, since that may cast doubt on your entire work. Each resultline is the outpout from the program and if they should be trusted they should be written exactly as the program did to the last jota, so please don't change anything.

20121109, 19:27  #7 
Aug 2005
118_{10} Posts 
I am not intending to edit any results lines. I just report the results lines as they are. What I am asking about now is how to find exponents where hundreds of single curves were run. My plan is to find a factor, no editing.

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