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 2006-11-26, 11:19 #1 DJones     Oct 2006 73 Posts Discrepancy? I can't see this anywhere in the FAQ or in the introduction to newbies, and I hope I'm asking this in the right place. Apologies if I'm not. Anyway, according to the Primenet Assignments Report (snippet below) there are still some 14xxxxxx exponents being LL-ed for the first time. Whereas according to Mr. Woltman's GIMPS status page "All exponents below 18,000,900 have been tested at least once." So... what's going on? Code:  prime fact current days exponent bits iteration run / to go / exp date updated date assigned account ID computer ID -------- -- ---- --------- ----------------- --------------- --------------- -------------- ------------ 14264087 66 8991949 2.6 77.4 85.4 23-Nov-06 21:58 aquazer aquazer 14271473 66 2214507 66.0 45.2 86.2 24-Nov-06 16:30 21-Sep-06 11:15 S319085 C1885EBB3 14288077 66 484893 28.4 27.6 59.6 29-Oct-06 02:12 xu7118 xulei 14325617 66 4520449 64.7 -0.7 23.3 22-Sep-06 18:52 gselabs SCI-125 14350387 66 7872400 10.6 2.8 59.8 25-Nov-06 06:37 15-Nov-06 20:24 haveland CB5BECAC7 14355337 66 41.4 10.0 70.0 24-Nov-06 11:59 16-Oct-06 01:29 . CE4A8D3E7 14360881 66 6455 19.5 -8.5 51.5 07-Nov-06 00:24 S357064 C85888470 14370313 66 7716927 10.9 17.1 59.1 24-Nov-06 14:30 15-Nov-06 13:47 Team_Prime_Rib Reboot_It135 14371451 66 6287824 10.7 513.4 56.4 21-Nov-06 20:45 15-Nov-06 19:10 WileECoyote S18365 14395531 66 9496321 51.0 9.0 69.0 17-Nov-06 10:19 06-Oct-06 10:21 anbi gruppi1 14405561 D 66 9660370 250.7 -3.9 56.1 17-Nov-06 13:58 20-Mar-06 19:44 zwirunio 20 14440567 D 66 2025791 182.8 0.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14440661 D 66 182.8 3.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14443531 D 66 182.8 7.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14443889 D 66 182.8 10.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14447681 D 66 182.8 14.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop
2006-11-26, 13:01   #2
Mini-Geek
Account Deleted

"Tim Sorbera"
Aug 2006
San Antonio, TX USA

17·251 Posts

Quote:
 Originally Posted by DJones I can't see this anywhere in the FAQ or in the introduction to newbies, and I hope I'm asking this in the right place. Apologies if I'm not. Anyway, according to the Primenet Assignments Report (snippet below) there are still some 14xxxxxx exponents being LL-ed for the first time. Whereas according to Mr. Woltman's GIMPS status page "All exponents below 18,000,900 have been tested at least once." So... what's going on? Code:  prime fact current days exponent bits iteration run / to go / exp date updated date assigned account ID computer ID -------- -- ---- --------- ----------------- --------------- --------------- -------------- ------------ 14264087 66 8991949 2.6 77.4 85.4 23-Nov-06 21:58 aquazer aquazer 14271473 66 2214507 66.0 45.2 86.2 24-Nov-06 16:30 21-Sep-06 11:15 S319085 C1885EBB3 14288077 66 484893 28.4 27.6 59.6 29-Oct-06 02:12 xu7118 xulei 14325617 66 4520449 64.7 -0.7 23.3 22-Sep-06 18:52 gselabs SCI-125 14350387 66 7872400 10.6 2.8 59.8 25-Nov-06 06:37 15-Nov-06 20:24 haveland CB5BECAC7 14355337 66 41.4 10.0 70.0 24-Nov-06 11:59 16-Oct-06 01:29 . CE4A8D3E7 14360881 66 6455 19.5 -8.5 51.5 07-Nov-06 00:24 S357064 C85888470 14370313 66 7716927 10.9 17.1 59.1 24-Nov-06 14:30 15-Nov-06 13:47 Team_Prime_Rib Reboot_It135 14371451 66 6287824 10.7 513.4 56.4 21-Nov-06 20:45 15-Nov-06 19:10 WileECoyote S18365 14395531 66 9496321 51.0 9.0 69.0 17-Nov-06 10:19 06-Oct-06 10:21 anbi gruppi1 14405561 D 66 9660370 250.7 -3.9 56.1 17-Nov-06 13:58 20-Mar-06 19:44 zwirunio 20 14440567 D 66 2025791 182.8 0.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14440661 D 66 182.8 3.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14443531 D 66 182.8 7.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14443889 D 66 182.8 10.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop 14447681 D 66 182.8 14.6 57.6 23-Nov-06 02:58 27-May-06 16:21 shaneamy Laptop
Those are double-checks. A LL test has a ~1% chance to make an error, so all exponents are tested twice (double-checked) to make sure their residues match. All below 18,000,900 have indeed been tested once, but there is a ~1% chance on each of those that the residue returned was incorrect, meaning that it's possible we missed a prime.

2006-11-26, 13:30   #3
DJones

Oct 2006

73 Posts

Quote:
 Originally Posted by Mini-Geek Those are double-checks. A LL test has a ~1% chance to make an error, so all exponents are tested twice (double-checked) to make sure their residues match. All below 18,000,900 have indeed been tested once, but there is a ~1% chance on each of those that the residue returned was incorrect, meaning that it's possible we missed a prime.
I'm well aware that double-checking takes place, thank you. The report however puts a "D" next to double-checks; I even deliberately included some on the snippet so that people could see the difference. The first few lines of the snippet though, do not have that "D", so my question still stands.

 2006-11-26, 15:36 #4 Prime95 P90 years forever!     Aug 2002 Yeehaw, FL 2×41×89 Posts When in doubt, ignore the PrimeNet server's report. It could be that these exponents were re-released as first time tests ages ago because the first test had a suspect error code. Or the server may simply be confused.
 2006-11-26, 15:39 #5 S485122     Sep 2006 Brussels, Belgium 33×61 Posts I asked the same question some time ago and got an answer : Status of PrimeNet
 2006-11-26, 18:10 #6 DJones     Oct 2006 73 Posts Thank you both for your responses - it's nice to see some people read the question carefully before answering. Could a simple database query not alter the flag on all tests <18000000 to be double-checks as opposed to first-timers, or would the time that takes to run and the risk of it causing more problems make it not worth the hassle?
 2006-11-26, 18:50 #7 S485122     Sep 2006 Brussels, Belgium 164710 Posts GIMPS accepts any result. PrimeNet only accepts results for assigments it distributed. Users who got their assignments from PrimeNet played according to the rules and should not be penalised. On the other hand there is some cleaning to do in the PrimeNet database : assigments that are more than 5 years from expiring for instance and no progress report...
2006-11-26, 19:55   #8
DJones

Oct 2006

73 Posts

Quote:
 Originally Posted by Jacob Visser GIMPS accepts any result. PrimeNet only accepts results for assigments it distributed. Users who got their assignments from PrimeNet played according to the rules and should not be penalised.
Ah, yes, I'd forgotten about the scoring - I'm not that bothered by points but I appreciate that others are only concerned with leaderboards and stuff though. Whilst I agree that people who got their numbers from PrimeNet shouldn't have their points affected by results sent in by those who didn't, it's a little unfair to suggest that those who don't get their numbers from PrimeNet somehow aren't playing "according to the rules" - they are, after all, still voluntarily contributing to the project. Most of the people who test numbers without using PrimeNet (LMH, Mersenne-aries, etc) aren't interested in points in the first place.

Quote:
 Originally Posted by Jacob Visser On the other hand there is some cleaning to do in the PrimeNet database : assignments that are more than 5 years from expiring for instance and no progress report...
Slow machines with sporadic internet access maybe? </clutching at straws>
I'd be (slightly) more concerned if they'd been *running* for five years and hadn't done a progress report...
I still can't believe someone is willing to let their machine run for five years just to test one number, but then humans have always baffled me as a most bizarre race.