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-   -   Collaboration with PrimeGrid? (https://www.mersenneforum.org/showthread.php?t=8599)

hhh 2007-07-05 14:42

Collaboration with PrimeGrid?
 
[url]www.primegrid.com[/url] is currently starting Woodall and Cullen searches without consideration of the primality of the candidate n's. While Woodall is asready full steam ahead, the Cullen-part isn't online yet because the client needs some adaptations. The start is in about a week or so.

I had some contact with Rytis, the primegrid's admin, and there is the possibility to just release all of our already sieved numbers into their queue before they start with their candidates, and to get residues in no time.

Of course this would mean that we just have to restart sieving, and the perspective for the future would be completely changed.

What do you think?

Yours H.

Citrix 2007-07-05 15:48

[QUOTE=hhh;109655][url]www.primegrid.com[/url] is currently starting Woodall and Cullen searches without consideration of the primality of the candidate n's. While Woodall is asready full steam ahead, the Cullen-part isn't online yet because the client needs some adaptations. The start is in about a week or so.

I had some contact with Rytis, the primegrid's admin, and there is the possibility to just release all of our already sieved numbers into their queue before they start with their candidates, and to get residues in no time.

Of course this would mean that we just have to restart sieving, and the perspective for the future would be completely changed.

What do you think?

Yours H.[/QUOTE]


Well they could remove all prime n's from their queue and we can make sure that we always stay ahead of them. This way no primes would be missed.

Siemelink 2007-07-05 19:22

[QUOTE=hhh;109655][url]www.primegrid.com[/url] is currently starting Woodall and Cullen searches without consideration of the primality of the candidate n's. While Woodall is asready full steam ahead, the Cullen-part isn't online yet because the client needs some adaptations. The start is in about a week or so.

What do you think?

Yours H.[/QUOTE]

I think that a dual approach would leave people of different temperament to choose what they are after. Mass effort vs tailored approach.
As for me, my Woodall effort is drawing to a close. I'll finish soon with the range 1.2M until 1.6M. I have my eyes on a different project so I welcome someone else effort on Woodalls.

Willem.

hhh 2007-07-05 20:04

[QUOTE=Citrix;109669]Well they could remove all prime n's from their queue and we can make sure that we always stay ahead of them. This way no primes would be missed.[/QUOTE]

Can we? PrimeGrid is no baby framework.
On the other hand: if we stay ahead, we can let them do the doublecheck as well. H.

Phased_Array 2007-07-05 21:55

I don't think this project can stay ahead of PrimeGrid. With just a few early testers they were completing tests at a rate of 1000 K's/hour (lower K/N values than on this project though).

Best bet if you want to keep this project going (and I hope you do) is ask them (Rytis and/or John [jmbazek]) to remove the ranges your testing. Hopefully they will comply with the request.

If you do decide to continue with the project, I would like to do a little LLR work if possible. Good Luck!

hhh 2007-07-06 07:05

[QUOTE=Phased_Array;109715]
Best bet if you want to keep this project going (and I hope you do) is ask them (Rytis and/or John [jmbazek]) to remove the ranges your testing. Hopefully they will comply with the request. [/QUOTE]

They proposed that already. But wouldn't it be contra-intuitive to keep doing tests that would have been done faster anyway? The whole idea about PCP was to do the prime tests before.

What about this scenario: We give them some candidates, say up to 4M, and keep a few for us. And we restart sieving.

If they still overhaul us, we reiterate the process. If not, well, then fine. This way, people have the choice to do testing in advance to the masses, and the masses do some work in advance they would have done later anyways. IMO, that would be a good compromise.

I think it would be narrow-minded just to turn a blind eye to something that IS THERE.

Yours H.

rogue 2007-07-06 13:04

Who runs PrimeGrid? It would have been nice if they had contacted either me or Ray Ballinger since the search has been coordinated on [url]www.prothsearch.net[/url] for years. There are people who are currently working on ranges and it isn't particularly nice of them to "poach" from another project.

Phased_Array 2007-07-06 15:41

They "claim" to have asked around ("if anyone was working on these ranges"). I have yet to see any mention of this by them in of the usual places.

hhh 2007-07-06 15:54

Well, they asked me, for instance. They should have asked you, though, rogue. Hmm. H.

geoff 2007-07-07 00:38

Since primegrid is sieving all candidates in a larger range, it might take them some time to reach the depth that we have sieved to, so I would like to keep LLR testing our candidates at least until they catch up, if that doesn't complicate things too much.

After that it would be good if we could combine our resources in sieving, but still have some way of focusing our LLR efforts on the Cullens with prime exponent. I don't know how best to do that, we certainly don't want to reserve the prime exponents for seperate testing if that would delay them being tested along with the others.

rogue 2007-07-09 16:47

I have been working with the folks at PrimeGrid so all issues will be worked out shortly. AFAIK, they have not "poached" work from anybody as they contacted other searchers on their own.


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