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Old 2015-12-31, 18:20   #1
Gordon's Avatar
Nov 2008

3·167 Posts
Default GMP-ECM & Prime95 Stage 1 Files


I am using Prime95 to do stage 1 factoring on small exponents (typically less than 50k) and then feeding those curves, about 1000 at a time into GMP-ECM for stage 2.

With the latest version posted here, it doesn't like the part of the file that has the date/time in throwing this

"Error, save file line has no '=' in : [Fri Dec 11 18:"

I can solve it by opening the file in notepad++ and doing a regex replace as follows

find: (\W).*(])
replace: null or space

Although this is low priority can some future version coexist happily with P95 stage 1 output files?
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Old 2015-12-31, 18:59   #2
P90 years forever!
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Aug 2002
Yeehaw, FL

2·3·19·67 Posts

I'll look into a prime95 option. Although best would be for GMP-ECM to just ignore any lines it does not understand.
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Old 2016-01-01, 19:54   #3
WraithX's Avatar
Mar 2006

1E616 Posts

It looks like GMP-ECM did ignore lines it didn't understand until svn revision 2681. At that point, a change was made so that "with -resume, now abort in case of corrupted line".

I'll send PaulZ an email and ask what he thinks of switching back to the old way of handling resume lines, or if there is another option we can explore.
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Old 2016-01-08, 12:44   #4
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Mar 2006

48610 Posts

I have reverted this change with svn 2750. GMP-ECM will perform like it did before and skip lines it isn't expecting.
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