mersenneforum.org Assignment Problems
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 2012-03-08, 00:14 #1 Prime95 P90 years forever!     Aug 2002 Yeehaw, FL 2×5×769 Posts Assignment Problems A manual user emailed me that these exponents are now registered to GPUto72: 50311747 (running, non-networked) 42576463 (running, networked) 45522661 (queued on networked CPU) 42578279 (ditto) 43094647 (running, non-networked) 43163753 (queued on networked CPU) 42578609 (running on networked CPU) The server should not have handed these out - so some investigation is required. In the meantime, can these exponents be quarantined and not handed out to any users (or if already handed out can you please stop testing until the user has a chance to complete his first time test)?
 2012-03-08, 00:39 #2 Dubslow Basketry That Evening!     "Bunslow the Bold" Jun 2011 40
 2012-03-08, 01:05 #3 kladner     "Kieren" Jul 2011 In My Own Galaxy! 2×3×1,693 Posts Whew! At first look I thought I had one of those, at 36.7% completion. A closer look showed that just the last three digits were the same (661).
 2012-03-08, 02:55 #4 Dubslow Basketry That Evening!     "Bunslow the Bold" Jun 2011 40
2012-03-08, 17:54   #5
chalsall
If I May

"Chris Halsall"
Sep 2002

22×7×359 Posts
George, PrimeNet has a problem.

Quote:
 Originally Posted by Prime95 A manual user emailed me that these exponents are now registered to GPUto72: 50311747 (running, non-networked) 42576463 (running, networked) 45522661 (queued on networked CPU) 42578279 (ditto) 43094647 (running, non-networked) 43163753 (queued on networked CPU) 42578609 (running on networked CPU) The server should not have handed these out - so some investigation is required. In the meantime, can these exponents be quarantined and not handed out to any users (or if already handed out can you please stop testing until the user has a chance to complete his first time test)?
I hope people don't think I'm ignoring this; I'm not. But I have "real" work to do as well, and it took a bit of time to drill down on these candidates against the knowledge I happen to have.

George... I used a new technique to aquire candidates, which I will PM you the details about shortly. It was, in my opinion, entirely "legal", and I used a "slaved" mprime and the PrimeNet API to do so. As in, it was entirely your code which did this.

However, I think four things are important...

1. Please note the reservation dates of the above candidates:

Code:
42576463 - 2008-11-24
42578279 - 2008-11-30
42578609 - 2008-12-08
43094647 - 2008-12-02
43163753 - 2008-12-02
45522661 - 2008-11-25
50311747 - 2008-10-28
1.1. Please note that no LL work had been done on them (or, at least, not reported).

2. The user in question is not questioning the "loss" of approximately 200 other candidates.

3. The user in question produces approximately two (2) LL results a month.

4. The user in question also has four "Trial Factoring" assignments from 2008-11-26, 1191 days ago, which have been independently completed by other workers.

4.1. To be explicit, the TF work was not coordinated by GPU72.

4.2. To be more explicit, the candidates I'm talking about are 51130021, 51163129, 51208343 and 51208343.

4.2.1. Don't you think it might make sense for PrimeNet to release these back into the Pool for LL work?

At the end of the day the GPU to 72 project's goal is to help find the next Mersenne Prime.

If finding bugs in PrimeNet is part of the process, I would argue that is simply a healthy example of the Scientific Method.

 2012-03-09, 00:56 #6 chalsall If I May     "Chris Halsall" Sep 2002 Barbados 274416 Posts So, as an experiment, I manually requested "Trial Factoring" work from PrimeNet shortly after midnight UTC. I was given two assignments below 45M to TF from 69 to 70. Note that these are below where "Spidy" is given assignments. And further note that these were assigned to "Anonymous" to LL on "2011-07-20". According to the historical data I have, these were both at approximately 43% complete of the LL test. George -- should I "hold off" doing any testing on these as well?
2012-03-09, 02:24   #7
Prime95
P90 years forever!

Aug 2002
Yeehaw, FL

2×5×769 Posts

Quote:
 Originally Posted by chalsall So, as an experiment, I manually requested "Trial Factoring" work from PrimeNet shortly after midnight UTC. I was given two assignments below 45M to TF from 69 to 70. Note that these are below where "Spidy" is given assignments. And further note that these were assigned to "Anonymous" to LL on "2011-07-20". According to the historical data I have, these were both at approximately 43% complete of the LL test. George -- should I "hold off" doing any testing on these as well?
I don't have strong feelings one way or the other on "holding off". I need to drill down and figure out why Primenet is releasing these as TF assignments.

To be clear, I'm not accusing anyone of doing anything underhanded. I just need to figure out how it happened and correct it. The user in question has been around a long time contributing with slow machines. He obviously becomes frustrated when "poached".

As to recycling seemingly abandoned TF assignments, we need to look into this. It is a separate issue.

 2012-03-10, 21:41 #8 Prime95 P90 years forever!     Aug 2002 Yeehaw, FL 2×5×769 Posts The user also reports these exponents were scooped: 42578197 42652487 42968837 43025869 43055297 43110383 If you have one of them, please don't LL it. Chalsall and I think we have figured out why this has happened so we can prevent this in the future.
 2012-03-10, 21:51 #9 Dubslow Basketry That Evening!     "Bunslow the Bold" Jun 2011 40
2012-03-10, 22:13   #10
Prime95
P90 years forever!

Aug 2002
Yeehaw, FL

2·5·769 Posts

Quote:
 Originally Posted by Dubslow This is perhaps a bold proposition...
I've just emailed the user explaining what happened. The fairest thing is to let the user reclaim as many of his exponents as possible. The fact that they are "milestone exponents" is irrelevant.

I've also suggested he join gpu72.com to get LL tests in the future. He enjoys testing smaller exponents (as do I) and this is the best way to get them.

2012-03-10, 22:15   #11
chalsall
If I May

"Chris Halsall"
Sep 2002

1005210 Posts

Quote:
 Originally Posted by Dubslow From the initial post here, it seems about half of the expos are not yet running. Seeing as these are milestone exponents, and we (you) are able to communicate with said user, would he be willing to not run those which aren't already going, and instead pass them out to forum goers here so that all those low expos can be run "in parallel" and completed as soon as possible?
I'm glad someone said it...

I have to say I agree. Why should someone be able to reserve (several hundred) candidates, and then sit on them for more than three years?

Please note the following data on these latest six candidates:

Code:
Candidate - Reserved Date - Estimated Completion
42578197 - 2008-12-02 - 2009-02-08
42652487 - 2008-11-24 - 2011-02-22
42968837 - 2008-12-07 - 2009-04-19
43025869 - 2008-11-24 - 2011-03-01
43055297 - 2008-11-24 - 2011-03-01
43110383 - 2008-11-24 - 2011-03-02
George... While I will abide by anything you tell me to do with regards to PrimeNet and this project, it has to be said that all of these would have been recycled long ago if PrimeNet followed the expiry rules you yourself have said are in place.

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