Re: Mersenne: Bug in version 22.10
On Tuesday 05 November 2002 21:40, George Woltman wrote:
I'd actually recommend not doing the P-1 again. If you are using enough
memory to run both P-1 stages, then the bug did not affect stage 1 but did
affect stage 2.
If you run only stage 1 of P-1, then the bug would cause no factors to be
found.
In this case, you might consider re-running P-1 again as Brian suggests
(but only if you used 22.10 dated after Sept 28).
I did this on my own system have been rewarded with _two_ factors
found -
This is way above expectations! Nevertheless, I'm always happy to get the
factors.
Sure, I was surprised too. Anyway this is what I got:
{system 1}
[Wed Oct 30 21:00:54 2002]
UID: beejaybee/slug1, M8589491 completed P-1, B1=4, B2=42, WY2:
DE3C48D7
...
[Tue Nov 5 10:15:49 2002]
P-1 found a factor in stage #1, B1=4.
UID: beejaybee/slug1, M8589491 has a factor: 42333443925749970809
{system 2}
[Thu Oct 31 23:12:50 2002]
UID: beejaybee/caterpillar, M8564431 completed P-1, B1=45000, B2=618750, WY2:
DDB16BFB
[...]
[Tue Nov 5 12:44:02 2002]
P-1 found a factor in stage #2, B1=45000, B2=618750.
UID: beejaybee/caterpillar, M8564431 has a factor: 9592239270614293063
There's no particular reason to suspect that a glitch on either system caused
a factor to be missed on the first run. I did have a couple of problems with
cabbage in the summer which turned out to be due to a UPS overload, but
that's fixed now.
Regards
Brian Beesley
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Re: Mersenne: Bug in version 22.10
- Original Message - From: George Woltman [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, November 05, 2002 5:19 AM Subject: Mersenne: Bug in version 22.10 Hi all, Sigh If you downloaded a version 22.10 dated September 28 or later, then please upgrade to version 22.11 at http://www.mersenne.org/freesoft.htm Does this version only affect 22.10? Or versions before that? The bug causes factors to be missed in the final stage of P-1 and ECM factoring. While this isn't the end of the world, it will cause you to run an unnecessary LL test. Sorry for the trouble, That's what beta testers are for. George Daran G. _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Bug in version 22.10
Hi, One thing you might consider - when you change to v22.11, check out your results file. If you have a P-1 run logged on an exponent you haven't yet started LL/DC testing, make it run the P-1 again (change the ,1 at the end of the assignment line in worktodo.ini to ,0). If you are already running the LL or DC test, things are not quite as straightforward; I'd reccomend: For DC tests, if less than half done, force P-1 to rerun (as above) else just let it run on. For LL tests, if less than 1/3 done, force P-1 to rerun (as above). If between 1/3 and 2/3 done, change the test type from Test to DoubleCheck then force P-1 to rerun. (This makes the P-1 limits smaller - with a lower chance of finding a factor, but using less time). If more than 2/3 done, just let it run on. I did this on my own system have been rewarded with _two_ factors found - one on an unstarted DC assignment, one on a DC assignment which was about 40% of the way through - there are still a few repeat P-1s running, too. Regards Brian Beesley ... On Tuesday 05 November 2002 05:19, George Woltman wrote: Hi all, Sigh If you downloaded a version 22.10 dated September 28 or later, then please upgrade to version 22.11 at http://www.mersenne.org/freesoft.htm The bug causes factors to be missed in the final stage of P-1 and ECM factoring. While this isn't the end of the world, it will cause you to run an unnecessary LL test. Sorry for the trouble, George _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Bug in version 22.10
At 06:51 PM 11/5/2002 +, Daran wrote: Does this version only affect 22.10? Or versions before that? Only version 22.10 and only if the executable is dated after Sept 28. Sorry for the trouble, That's what beta testers are for. That's what was so ironic. After being in a relatively problem-free beta test period I finally called it official. Murphy's Law strikes again with a bug a few days later. _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Bug in version 22.10
At 07:19 PM 11/5/2002 +, Brian J. Beesley wrote: One thing you might consider - when you change to v22.11, check out your results file. If you have a P-1 run logged on an exponent you haven't yet started LL/DC testing, make it run the P-1 again (change the ,1 at the end of the assignment line in worktodo.ini to ,0). I'd actually recommend not doing the P-1 again. If you are using enough memory to run both P-1 stages, then the bug did not affect stage 1 but did affect stage 2. If you run only stage 1 of P-1, then the bug would cause no factors to be found. In this case, you might consider re-running P-1 again as Brian suggests (but only if you used 22.10 dated after Sept 28). I did this on my own system have been rewarded with _two_ factors found - This is way above expectations! Nevertheless, I'm always happy to get the factors. _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Bug in version 22.10
- Original Message - From: Daran [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, November 05, 2002 6:51 PM Subject: Re: Mersenne: Bug in version 22.10 - Original Message - From: George Woltman [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, November 05, 2002 5:19 AM Subject: Mersenne: Bug in version 22.10 Hi all, Sigh If you downloaded a version 22.10 dated September 28 or later, then please upgrade to version 22.11 at http://www.mersenne.org/freesoft.htm Does this version only affect 22.10? Or versions before that? If I'd properly read what George had said, I would know the answer. Please disregard. Daran G. _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Bug in version 22.10
- Original Message - From: Brian J. Beesley [EMAIL PROTECTED] To: George Woltman [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Tuesday, November 05, 2002 7:19 PM Subject: Re: Mersenne: Bug in version 22.10 Hi, One thing you might consider - when you change to v22.11, check out your results file. If you have a P-1 run logged on an exponent you haven't yet started LL/DC testing, make it run the P-1 again (change the ,1 at the end of the assignment line in worktodo.ini to ,0). George said The bug causes factors to be missed in the final stage of P-1 and ECM factoring. The way I read that is that stage 1 is OK, but *some* factors may be missed in stage 2 If that's correct, then any user whose system does not do stage 2 at all (because they've allocated no extra memory) should not rerun their stage 1. Even if it does, it's probably not worth rerunning the entire P-1 just to get a (possibly reduced) chance of finding a factor in stage 2 Regards Brian Beesley Daran _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Bug in version 22.10
Hi all,
Sigh If you downloaded a version 22.10 dated September 28 or
later, then please upgrade to version 22.11 at
http://www.mersenne.org/freesoft.htm
George, you are still the man. We wont take
your picture down off the piano. {8^D spike
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