RE: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
Hi all, Thanks for everyone's supportive comments and suggestions. Your dedicated participation and positive outlook are at the heart of this project's success. Retesting will go quickly: The virtual machine has slowed about 25 gigaflops from 550 to absorb the bug hit, but this should be offset by at least a factor of 2 in the next 2 weeks by the 1050 people who joined in the last 7 days. It should then notch back upward past 600 gigaflops within 3 weeks, maybe as high as 620 in week 4. Partly cloudy, then clearing to fair skies late in the month. I could be way wrong, but it's fun to test my mental model this way. > > Would I be right in assuming that Primenet keeps track of > > which version was used to check in a certain result? > > Scott can answer this best. He may not be able to tell if a result > was finished by v17 and started by v16. PrimeNet now has both algorithm and version for each client and each exponent. The versions are being populated as each client contacts the server, and reflect only the *last* client to do so. Formerly, only the algorithm was recorded. I don't recall why we never captured version data other than in the logs. Early sampling of Australia, Asia, Africa and Europe suggests we are about half way through upgrading to v18.1, but that might be over-optimistic as those are roughly 40% of the machines on PrimeNet. The other 60% are in the Americas, and most have not checked in yet today. We should have a fairly solid estimate in a week or so. > It would be very helpful if there were a way to request, > from the Primenet server, a list of machines and the > version reported by their last result. This would make > administration of more than a few machines much easier. > Any possibility of this? PrimeNet account reports now show any known v17 clients. v18 will not appear as they did in the stopgap report change yesterday. > Could we not credit those users who have had their > intermediate files wiped as a result of updating to > v18 for the work carried out up to the last time > they checked in the exponent to PrimeNet? Certainly. We are doing so on PrimeNet's accounts, as you suggested, in proportion to percent (or iteration ratio) complete. So far, it has only been as requested or at our urging for the very disappointed. > Scott, if there's any way you could send me a description > of the log file format, (and perhaps a small extract), I > could look at writing a program which you could use to do > the processing, but I won't be able to look at it > for a week or two. Couldn't hurt to try. Brian, please email me privately when you have a few days. Best regards, scott Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
George, I have plenty of reasons to feel that you should not be so worried with what happened : - Since I joined GIMPS project more than three years ago, you always impressed me with your thorough work. You have proved several times your professionalism, up to the way you announced this bad news, honestly and humbly. - Don't forget your motto : 'just for fun'. A small bug in a program whose primary goal is to entertain all of us is nothing compared with e.g what happens now in Kosovo.. - Even the great Mersenne himself commited two bugs, by incorrectly 'proving' primality of M(67) and M(257). You have been wrong only once... George, the hardest is now behind us, let's discover M38 quickly and everything will be forgotten. Regards, Jean-Yves -Original Message- From: George Woltman <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date: 02 April 1999 01:07 Subject: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17 >Hi all, > > Please forgive me. I'm terribly sorry. I've discovered a bug >in version 17 of prime95 and its variants (ntprime, mprime, OS/2 version). >All Lucas-Lehmer tests above 4,194,304 (except those that were done as >a continuation of a v16 run) are no good. I feel sick. > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
On Thu, 1 Apr 1999, George Woltman wrote: > As alluded to earlier, version 18.1 is available. Those that > already upgraded to 18.0 can upgrade at your leisure. > Version 18.1 will get LL tests assigned to it, whereas version > 18.0 will only get double-checks assigned. > The deleting of v17 save files below 4.2M is fixed. Somehow I find it suspicious that the assignments status report http://entropia.com/primenet/status.txt shows no change at all in the pattern of assignments, something that should have been immediately visible if ~1 exponents had been recycled for first time LL-testing and if all old clients should only be getting double checking assignments. In the last three days, about the same number of exponents have been assigned in the 7.3M range each day, with no indication of the drop that would have been expected if all 17.* clients only got DoubleChecking assignments. Ditto for then expected jump in doublechecking assignments. Conclusion: Either it really IS an Aprils fool joke, or Scott haven't updated the primenet software, something that doesn't ring true with his previous performance. Henrik -- Henrik Olsen, Dawn Solutions I/S URL=http://www.iaeste.dk/~henrik/ Get the rest there. Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
RE: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
Hi, I'm at 92% off my current exponent, should i upgrade now or waste 2 more days to produce a (possible wrong) result? Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
George, if it is a joke, you got me. {8^D If not, we forgive you.
You are still the man. We wont take your picture down off the
piano. {8^D spike
> > Please forgive me. I'm terribly sorry. I've discovered a bug
> > in version 17 of prime95 and its variants (ntprime, mprime, OS/2 version).
Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
RE: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
> I've asked Scott to change Primenet to assign double-checking > work to version 17 clients in the future. PrimeNet's assignment rule was put into place shortly after George's message. v17 clients asking for LL tests will get double-checking. Folks, we now have more continuous CPU time on LL tests than ever before in all of human history. And recently new members are joining six times faster than usual, over 120 per day. GIMPS will bounce back quickly. Best regards, scott Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
On Thu, Apr 01, 1999 at 06:04:50PM -0500, George Woltman <[EMAIL PROTECTED]> wrote: > > After upgrading, you will get error messages that look like this: > Error reading intermediate file: p6180331 > Renaming intermediate file q6180331 to p6180331. > Error reading intermediate file: p6180331 > This is normal. Prime95 must discard the incorrect version 17 > save files. Will it also discard version 17 save files for double checks? I'd assume so, but thought I'd ask just to make sure. Bryan -- Bryan Fullertonhttp://www.samurai.com/ Owner, Lead Consultant http://www.feh.net/ Samurai Consulting http://www.icomm.ca/ "No, we don't do seppuku." Can you feel the Ohmu call? Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
RE: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
This seems frighteningly like an April Fools joke. Please confirm! > -Original Message- > From: George Woltman [SMTP:[EMAIL PROTECTED]] > Sent: Thursday, April 01, 1999 3:05 PM > To: [EMAIL PROTECTED] > Subject: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17 > > Hi all, > > Please forgive me. I'm terribly sorry. I've discovered a bug > in version 17 of prime95 and its variants (ntprime, mprime, OS/2 version). > All Lucas-Lehmer tests above 4,194,304 (except those that were done as > a continuation of a v16 run) are no good. I feel sick. > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
Please, oh please tell me this is some kind of cruel April Fools Joke. It's not though is it? Oh well. Sorry. --Peter At 18:04 04/01/1999 -0500, you wrote: >Hi all, > > Please forgive me. I'm terribly sorry. I've discovered a bug >in version 17 of prime95 and its variants (ntprime, mprime, OS/2 version). >All Lucas-Lehmer tests above 4,194,304 (except those that were done as >a continuation of a v16 run) are no good. I feel sick. > > I've uploaded version 18 of prime95 and ntprime. I'll port it >to Linux and Windows 3.1 as soon as I can. Please download and install >this new version immediately from http:\\www.mersenne.org\freesoft.htm >Version 16 and earlier users were not affected by this bug. Neither >were those users that are double-checking. > > I've asked Scott to change Primenet to assign double-checking >work to version 17 clients in the future. I don't know if he can do this >or not, let's hope so. > > After upgrading, you will get error messages that look like this: >Error reading intermediate file: p6180331 >Renaming intermediate file q6180331 to p6180331. >Error reading intermediate file: p6180331 > This is normal. Prime95 must discard the incorrect version 17 >save files. > > My records indicate that 10,794 of the 59,169 Lucas-Lehmer tests >above 4,194,304 will have to be discarded. This will set GIMPS back >roughly 3 to 4 months. This will not affect your standings on the PrimeNet >server's Top Producer's page. > > For those that like to look at the bright side of things, I can find >only one bit of good news. This will give you a better chance to win the >$50,000 EFF prize once I sort out the mess and have the server hand out >smaller exponents to retest. > > Once again, I'm sorry for the bug and the wasted CPU cycles the >last few months. > >Humbled, >George > > >Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Mersenne: IMPORTANT: BUG IN VERSION PRIME95 17
Hi all, Please forgive me. I'm terribly sorry. I've discovered a bug in version 17 of prime95 and its variants (ntprime, mprime, OS/2 version). All Lucas-Lehmer tests above 4,194,304 (except those that were done as a continuation of a v16 run) are no good. I feel sick. I've uploaded version 18 of prime95 and ntprime. I'll port it to Linux and Windows 3.1 as soon as I can. Please download and install this new version immediately from http:\\www.mersenne.org\freesoft.htm Version 16 and earlier users were not affected by this bug. Neither were those users that are double-checking. I've asked Scott to change Primenet to assign double-checking work to version 17 clients in the future. I don't know if he can do this or not, let's hope so. After upgrading, you will get error messages that look like this: Error reading intermediate file: p6180331 Renaming intermediate file q6180331 to p6180331. Error reading intermediate file: p6180331 This is normal. Prime95 must discard the incorrect version 17 save files. My records indicate that 10,794 of the 59,169 Lucas-Lehmer tests above 4,194,304 will have to be discarded. This will set GIMPS back roughly 3 to 4 months. This will not affect your standings on the PrimeNet server's Top Producer's page. For those that like to look at the bright side of things, I can find only one bit of good news. This will give you a better chance to win the $50,000 EFF prize once I sort out the mess and have the server hand out smaller exponents to retest. Once again, I'm sorry for the bug and the wasted CPU cycles the last few months. Humbled, George Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
