mersenneforum.org > Data How often are triple checks released?
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 2004-01-01, 13:36 #1 patrik     "Patrik Johansson" Aug 2002 Uppsala, Sweden 52×17 Posts How often are triple checks released? In 2000 I tested a number (9666457) which had a non-matching double check returned Aug 06, 2003. This number has still not been released for triple checking. I am just concerned that regular triple checking has been forgotten when the discussion here has been about early double checking of error-prone machines. Since we have been discussing that double checks preferably should take less than six months, perhaps we shouldn't let triple checks lie untested for five months. Also, a few of my other machines have returned non-matching double checks, and I am very eager to know if it was my test or the original that had an error.
 2004-01-01, 18:05 #2 GP2     Sep 2003 259010 Posts Well, the motivation behind early double-checking is to ensure that every exponent has at least one non-error-prone result, to reduce the chances of a hidden prime. As long as there's one non-error-prone result, the final confirming check can be done routinely years later, as is the usual case. Early triple checks get done, but only if both previous results were error-prone. Regarding routine triple checks, I just assumed George has a system for releasing these at regular intervals. I'm certainly in favor of these getting released regularly, because every result in the BAD file only gets there as the result of a triple check, so regular triple checks are vital for improving statistics on which machines are error-prone. BTW, some bad news regarding your exponent: cleared.txt 9666457,65,D ,0xDF8FC03B96B1A9__,06-Aug-03 03:55,foxkid,DJ HRF3.TXT 9666457,osytol,gamma,WV1,00000000 9666457,foxkid,DJ,WX1,00000A14 With the error code 00000A14, it's extremely likely that it was your result that was the bad one, not the other guy's. Furthermore foxkid/DJ is an error-prone machine, and you also have a few more: Code: uv3h uv3 uv2 bad good ---- --- --- --- ---- 3 4 5 2 5 foxkid,DJ 0 0 0 4 0 foxkid,Eilif 0 0 0 1 5 foxkid,L-C 0 1 2 1 3 foxkid,RMikkelsen 0 0 0 1 9 foxkid,dj 0 0 0 7 1 foxkid,home-NT good = verified good results bad = verified bad results uv2 = results needing a 2nd check uv3 = results needing a 3rd or higher check uv3h = uv3 results that also had a "harmful" error code
 2004-01-01, 18:59 #3 patrik     "Patrik Johansson" Aug 2002 Uppsala, Sweden 52×17 Posts The good news (for me) is that I am not foxkid. I'm patrik in cleared and status, but for some reason unknown to me, the name gets translated to osytol in hrf3 and lucas_v. (Maybe it has something to do with running the v.17 of the client in 1999. That version of the client had a bug which made it return bad results. I think it was decided that the users could keep the credit despite the bad results (since it was a bug in the client). So maybe this was the way to handle that. Or it could be when I turned off and on "Use primenet" so my results were reported again, and emailed George, since I was worried they would count as double checks. (This was before the forums started.) BTW my v.17 bad results were removed completely from the stats files.)
2004-01-01, 20:24   #4
GP2

Sep 2003

2×5×7×37 Posts

Quote:
 Originally posted by patrik The good news (for me) is that I am not foxkid. I'm patrik in cleared and status, but for some reason unknown to me, the name gets translated to osytol in hrf3 and lucas_v.
This is actually very common, unfortunately (different usernames used by GIMPS data files and by PrimeNet). It makes certain kinds of datamining unreasonably difficult (for instance, BAD usually uses the PrimeNet usernames, but LUCAS_V.TXT and HRF3.TXT use the GIMPS usernames).

One more thing that will hopefully be resolved with the new server.

PS,
no osytol machines are error-prone.

Last fiddled with by GP2 on 2004-01-01 at 20:25

 2004-01-29, 19:38 #5 patrik     "Patrik Johansson" Aug 2002 Uppsala, Sweden 52×17 Posts My first bad results As I suspected, a few results of my ws001 computer are bad. I overclocked it to FSB 150 MHz and on the next exponent got an error almost at the beginning. So I lowered it to 149 MHz and started from scratch. In November I saw that three double-checks had non-matching residues, so I lowered the FSB again to 147 MHz. After that everything has verified. However, the exponents I ran during the time it was too heavily overclocked maybe should be released for early triple-checking again (like the Nov. 2003 release). These are the results I got (with a few extra columns of my own): Code:  Credit for Total FSB Status exponent credit changed to prime fact Lucas-Lehmer residue or factor exponent bits [residues partially masked] date returned computer ID -------- ---- -- -------------------------------- --------------- ------------ 19401049 67 0x18F254550847AE__ P 25-Aug-03 17:28 ws001 153.432 FSB150 19315313 67 0x9B3CA9248B456E__ P 2.021 03-Sep-03 04:32 ws001 159.938 FSB149 17381233 66 0x61FE7AE27C11EC__ P 1.625 09-Sep-03 19:09 ws001 168.671 16570577 66 0x74C1AF700A1E58__ P 1.549 16-Sep-03 06:36 ws001 172.792 16562111 66 0x6C48DB14F9FE0F__ P 1.548 21-Sep-03 18:30 ws001 181.815 16482581 66 0x690450F02D3105__ P 1.541 28-Sep-03 07:17 ws001 189.911 15521911 66 D 0x037076FFB68DEB__ T 1.451 04-Oct-03 07:05 ws001 196.272 20758553 67 0xCC73C63AF3D888__ P 2.809 15-Oct-03 19:28 ws001 212.787 10249501 65 D 0x27ED8080C667AC__ C 0.502 18-Oct-03 10:30 ws001 216.353 9803429 65 D 0x7C0D6B0CC6B9B2__ C 0.480 20-Oct-03 18:51 ws001 219.808 9804107 65 D 0x60E732F7D40E91__ C 0.480 22-Oct-03 19:27 ws001 222.257 10324879 65 D 0xF3F949DA179B18__ Bad 0.670 25-Oct-03 13:17 ws001 224.607 10339117 65 D 0xC582409ACEC489__ T 0.670 28-Oct-03 07:01 ws001 227.922 10370341 65 D 0x730D3231B6999B__ Bad 0.672 31-Oct-03 04:49 ws001 233.879 10378411 65 D 0xD63CD4AA26E2A6__ C 0.673 02-Nov-03 17:34 ws001 236.216 Status: C=cleared, P=Pending double-check, T=triple-check needed, Bad=bad The exponents to reassign would then be 19401049 19315313 17381233 16570577 16562111 16482581 15521911 20758553 since 10339117 is already assigned for triple testing. Last fiddled with by patrik on 2004-01-29 at 19:42
 2004-01-31, 22:19 #6 dsouza123     Sep 2002 2·331 Posts Not to hijack the main point of the thread How often are triple checks released but how do can/do you get different usernames ? When running Prime95 it only asks for username and password. What is the difference between GIMPS and Primenet ?

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