20090511, 11:13  #1 
May 2007
Kansas; USA
2^{2}·13·197 Posts 
NPLB future direction
That clinches it. We need to start sieving k=200010000 for n<3M.
Anyone game for that? lol 
20090511, 11:17  #2 
I quite division it
"Chris"
Feb 2005
England
31·67 Posts 
I'll sieve up to p=1000. Should be ready about August.

20090511, 11:25  #3 
Mar 2006
Germany
5446_{8} Posts 

20090511, 15:35  #4  
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
3^{4}×71 Posts 
Quote:
certainly more than a range of 1000 maybe up to k=10000 n<1M would be a good idea i suppose it depends on how much memory we would need to sieve such a humungous range 

20090511, 21:01  #5 
I quite division it
"Chris"
Feb 2005
England
31·67 Posts 
I think it would be good to search 2000 <k 3000 before top5000 gets into n=500,000 territory.

20090511, 21:17  #6 
I quite division it
"Chris"
Feb 2005
England
81D_{16} Posts 
All our reportable primes are now >620k. I miss the lower/easier ones.
(I'm Chris b.t.w. ) 
20090511, 23:14  #7  
May 2007
Kansas; USA
24004_{8} Posts 
Quote:
That said, with FreeDC crunching away on the 10th drive, NPLB has gotten a bit stale and that is definitely something that we want to avoid. All server ranges with the exception of G8000 are now in the n=620K700K range. Therefore, I think it's time to open up sieving efforts for k=20003000 for n=20K1M and k=3001001 for n=1M2M. These efforts have already been started on the side. Several users have expressed interest to me for both larger and smaller nranges. That was part of the intent of the 8th/10th drives but they got higher real quick. Not that I'm complaining; it's just that we need some more variety. We could also sieve k=30004000 for n=20K1M, catch it up to the k=20003000 range (which is still at a depth of P<1T) and then merge them together. We could also make a partial and manual "individual k" range out of some of these sieve ranges. Edit: I suspect we could get a k=20004000 range sieved to P=20T within < 2 months with a concerted effort, which should be sufficient for searching n<=600K. Chris, I'm sure we would be able to start on the range long before the 5000th place prime is at n=450K. I'm open to ideas. I'll move this discussion to a new thread as responses come in. Gary Last fiddled with by gd_barnes on 20090511 at 23:28 

20090511, 23:59  #8  
A Sunny Moo
Aug 2007
USA (GMT5)
79^{2} Posts 
Quote:
One thing, though, that I think we should keep in mind. I believe that as we continue to expand this project further and further up the krange spectrum, we need to start setting some hard limits for nvalues for given kranges, so that we're not piling up drives upon drives that are all going nowhere because they've passed the point where they're "interesting". How about this: for the range of k=14002000, let's set a "stopping point" of n=1M. That is, when it reaches 1M, we won't immediately move on to >1M. Instead, we'll spend those resources on the k=20004000 range, and get that up to whatever target we setpossibly 1M, or maybe 600K. Once that's done, we'd move on to the next range, possibly k=40006000 or something like that. Et cetera. k=4001001 could be left has the "no limit" rangei.e., that's the one that we continue to extend the nrange for whenever we finish the current range. That will fill out the highn end of the project's selection of work. Thoughts, flames, rotten tomatoes? Max 

20090512, 00:44  #9  
May 2008
Wilmington, DE
2^{2}×23×31 Posts 
Quote:
I think you will find people who enjoy just about any range you can come up with. I do think most people enjoy the lower ranges, so they can do those ranges and people like me can pick up the rest. Trying to keep up with Prime Grid does not interest me. My first thought about Lennarts' post was "Who Cares". I will lose exactly zero sleep trying to figure out how to beat Prime Grid. RPS was the goal. They are nonBoinc, so are we. Last fiddled with by MyDogBuster on 20090512 at 00:45 

20090512, 11:05  #10  
I quite division it
"Chris"
Feb 2005
England
81D_{16} Posts 
Quote:
And it looks so masterfully sieved too. btw How is the sieve depth on this? I guessed 3 or 4T. Quote:
edit: Maybe this thread should be split? Last fiddled with by Flatlander on 20090512 at 11:07 

20090512, 11:32  #11  
May 2007
Kansas; USA
2^{2}×13×197 Posts 
Quote:
Why would you need to ask? You sieved it to P=4T. I just created the drive and posted the files. I didn't check optimum depth but my guess is for such a small k and nrange that is n<=500K, that is sufficient. I'll split this thread off for further discussion. If people agree, I could start sieving k=30004000 for n=20K1M on Thursday and then coordinate with Karsten on merging it with his k=20003000. 300 k's move to fast (i.e. k=4001001 & 14002000) and so would 500 k's (i.e. k=20003000) with all of the horsepower we now have. Even after the major FreeDC folks leave at the end of May, I'm thinking the project needs to have a drive that proceeds VERY slowly; that is one with 1000 k's in it! THEN we would have drives that stay much longer at different search depths. Later on after we get k=3001001 for n=1M2M sieved enough for the lower nranges of that range, my hope is that the project would have high top5000 ranges, medium top5000 ranges, and lower top5000 ranges to search. One further thing; like we did for the individualk drive, I see no reason why we couldn't start searching n>1M for some k's, even if those k's are not yet contiguously searched to n=1M yet. But for Karsten's (and my) sanity, I think it's best to limit that to perhaps 50100 k's at the most. The individualk drive has worked well in that regard since it is only 50 k's. Since k=300400 is our lowest krange, that would be a good place to start searching n>1M. But one more thing: k=300400 may be searched completely to n=1M by the end of the year, which may be about when sieving is complete for the lower nranges of n=1M2M so the point may be moot. Gary 

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