It turns out that the primality testing in ECM-GMP isn't quite as much as it should be. My group has been doing thousands of curves on a few numbers that turn...
... A prime being called composite is a Bad Thing. GMP-ECM should perform a PRP test, and therefore should hapily claim a prime is composite once in a blue ...
I can reproduce the problem as well. Actually, there appears to be two problems. The two 'runs' (see below) of ecm were done back to back with no change to...
... There IS no problem. GMP-ECM is not a primality checker. it is a factoring program. It "assumes" that you are wise enough to give it composite numbers,...
On Tuesday, February 4, 2003, at 05:48 PM, jim_fougeron ... I accept your explanation for not doing a primality test, but what about the other issue I...
... declares ... It's really quite simple when they were declared to be composite. I run an ECM-GMP client/server system for a number of people. One of the...
... Which is all well and good, unless you're using a wrapper on ECM-GMP. Any wrapper will take the output and determine that the result of a crack is...
... Again, before pointing fingers at ECM-GMP, make sure that the client/server code correctly pulls out primes. Take a 200 digit prime, mult it by 1001, and...
... Strange things happen if the file is "not" a proper file (i.e. there is no trailing end of line marker on the last line of the file). The build you have...
... client/server ... by 1001, ... to a ... see ... treats it. ... prime, but ... nothing ... if the ... We've been using ECM-GMP (client/server) for a few...
... If we can't reproduce it, we can't even begin to look at the problem - what were the composite numbers that when split caused the prime numbers to be...
Jim: I have just downloaded ecm4c-r7-athlon-gcc_32.exe, and noticed that the -oe option says "Appending output data to file" and the -oe+ option says "Writing...
... clip ... clip ... True Phil, but since PaulZ does not seem to care that there have been significant enhancements to the usability of GMP-ECM in the recent ...
... This isn't run on Windows, but on a PowerMac G4. I changed the line encodings to be all of those three combinations, but there is no change. I even...
... Mark, Have you tried with my pipe-aware version of GMP-ECM? It treats input differently from Jims version, and will cope with '|'s and '<'s happily. ...
... line ... 5000. ... program ... doesn't ... Thank you for the command line. This also is a problem for me, and now that I can see what is happening, I can...
... input ... happily. The builds I have done handle pipe and redirection just fine Phil. If they don't, then please point out where? Jim. PS, I have also...
... I meant input issues in general. There does seem to be an input issue, unless a dozen characters going missing from the input is to be otherwise...
... Yes, Phil, there was a bug. A simple bug. I was reading from the wrong file handle (trying to clean up any extraneous stdin input, but instead read from...
Thanks to a suggestion by Greg (to check the factors log), I was able to backtrack and discover what the (human) problem was with the issue over primality. It...
... I always use the -o option (except when I found this bug), so I haven't had any problems. I see that Jim has found and fixed the problem I discovered. ...
Jim, How (and where, so I can peek at the code itself) does PFGW chose which bases it should use for a deterministic N-1 test? How successful is it at finding...
I have not dug into the proving code much at all Phil. But seeing that our fearless leader has taken a permanent hiatus, I (or someone) may have to look into...
While verifying old primes on the prime list I got stuck on Phi(3,-28631#^2). I started the proof a couple weeks ago: Fri, 07 Feb 2003 21:52:18 GMT with the...
This is one of the "nastier" proofs. PFGW starts out the proof with a 466398 bit value (not sure why primorials do this, but they do). I just started it, so...
I also see you use the -n switch. Could it be possible that you have a screen saver running (possibly even the NT lock workstation screen). Screen savers run...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
