PRPnet 1st drive-R/S base 2 even-k/even-n/odd-n

[MyDogBuster]

Ian, since you're now an admin, would you be willing to set up and run a sieving drive for your idea of bases <=250 with ~2k-20k remaining to n=100K?

I'm going to back off my idea. I have enough to do with my 1ker's and 2ker's to keep me busy for at least another 8 months. I agree with Max that it would spread us too thin. Let me see where we stand after I finish the 1 and 2ker's. Seems to me the high n searches and Mark's idea are basically the same thing.

[gd_barnes]

Originally Posted by MyDogBuster

I'm going to back off my idea. I have enough to do with my 1ker's and 2ker's to keep me busy for at least another 8 months. I agree with Max that it would spread us too thin. Let me see where we stand after I finish the 1 and 2ker's. Seems to me the high n searches and Mark's idea are basically the same thing.

Not exactly. The high n searches are for bases <= 32, although could be extended to slightly higher bases at some point -and- they are for bases with anywhere from 1 to ~10 k's remaining. Mark's idea is only to take 1kers for n=100K to ? so by default only includes bases searched to n=100K (or could include bases already searched to n=150K or 200K later on). Max and I decided on bases <= 250 for n=100K-250K to narrow down such an effort.

In other words, this drive is for "very tough" smallish bases to prove that were really part of the original project that only included bases <=32. They are ones that generally people with few resources would not want to work on because the tests take too long. For instance, after n=150K-250K for R31, I'd really like to push R26 (1k) for n=400K-500K or S30 (2k) for n=300K-400K.

I think it's great that you'll do all the 1kers and 2kers to n=100K yourself. Obviously there are a lot fewer 2kers than 1kers and your effort should make that even more in favor of the 1kers. Max and I (mostly Max) already did all 1k/2k/3k bases <= 250 to n=100K in preparation for Mark's idea. So you'll be solely working on bases > 250 in that effort.

BTW, your 1k effort is part of the reason that I've slowly worked my way up the bases with certain #'s of k's remaining at n=5K. I wanted to make sure you have a full set of bases that have 1k remaining at n=25K. I suspect that you do now because I'm working on the ones with 7 k's remaining at n=5K and no base is likely to prime 6 out of 7 remaining k's for n=5K-25K (although Mark did search one that primed 5 out of 6 k's for n=5K-25K and so now is a 1ker; so you never know).


Gary

[mdettweiler]

Originally Posted by gd_barnes

Max, would you be willing to admin Mark's idea by getting a sieving drive going for it?
...
Both of you would need to commit to keeping the additional drives going. There will be optimal sieve depth calculations involved, which will be very important to get correct on the high n's involved in Mark's idea.

Hmm...I'll probably be kicking myself for this down the road but yeah, I'll do it. We've got to do it sooner or later and my non-prime-related life is probably not going to get any less busy any time soon so now's as good a time as any.

(It might be a couple of days before I can get the sieving drive thread posted...I'll be needing to compile a list of all the 1k bases <250 at n=100K and calculate optimal depths for at least a few of them to provide some starting material.)

[MyDogBuster]

I think it's great that you'll do all the 1kers and 2kers to n=100K yourself. Obviously there are a lot fewer 2kers than 1kers and your effort should make that even more in favor of the 1kers.

What's really interesting with the 1 and 2ker's is that the number of 2ker's is almost exactly half of the number of 1ker's. That makes the actual work almost even between the 2.

Max, I learned long ago NEVER to volunteer for anything. LOL

Like I stated earlier, it's too bad that CUDA sieve doesn't handle bases other than 2. Sure would make your chore easier.

[gd_barnes]

Reserving n=150K-200K for port 1300. Max has been sent the file to load into the server. This will now include k=6962, which had previously been searched to n=150K, for a total of 5 k's.

Guys, I've sieved R31 for n=150K-250K to P=11T, the optimum depth for the entire range. If the interest is still there when we reach n=200K, we'll load in n=200K-250K. If there is little interest beyond n=150K, I'll start on it after I finish base 28 to n=250K in about 1-1/2 months.


Gary

[gd_barnes]

Moved discussion about bases 101-250 with 2 to 20 k's remaining to the bases 101-250 thread.

[mdettweiler]

Results have been processed for R31, n=120.2K-150K and are attached here. Two primes were found in this range.

[gd_barnes]

Max,

Please load n=200K-250K into the server. Thanks.

[mdettweiler]

Originally Posted by gd_barnes

Max,

Please load n=200K-250K into the server. Thanks.

Done.

[gd_barnes]

55940*31^197599-1 is prime!

4 k's remaining on R31.

[mdettweiler]

Hi guys,

Port 1300 is on track to dry out in <1 week. I will need to let it dry out completely so that I can upgrade the server to PRPnet version 4.1.4. This will add a few handy new features:

-Support for teams in the stats. A quick note for anyone who will want to take advantage of this feature: if your team name has spaces in it, you'll need to leave them out when entering it into PRPnet. For instance, my team "Raiders of the Lost Primes" would be entered as "RaidersOfTheLostPrimes". (Pre-4.1.x clients will still work as well, though since they do not support teams, the team column for results they turn in will show as a null entry and they will not be counted in the team stats. 4.1.x clients with no team configured, however, will be counted, under team "None".)

-A "usellroverpfgw" option on the server that instructs 4.x clients to use LLR instead of PFGW for non-power-of-2 bases. This may come in handy for the occasional base that LLR produces different residuals for (usually bases that can be converted to base 2 but aren't straight-up powers of 2).

-For Sierpinski/Riesel servers (like ours), k's that have been primed are not counted when determining the "Completed Thru" and "Leading Edge" columns on the webpages.

Once I have upgraded the server, I'll load it with some new work. Gary and I have been discussing what to run next in this server and we thought that taking the remaining unreserved Riesel/Sierpinski base 2 even/odd-n k's with n<1M to 2M would be interesting. The size of the effort is about right for port 1300, and it's something that's been sitting ripe for the picking for a while without much attention. There is also a fair amount of overlap with base 4, so primes found have a good chance of eliminating k's from more than one conjecture. And as an added bonus, any primes found will be megabits, so they're very nice finds in and of themselves.

Personally, I'll be running two quads on this as soon as it gets started...I'm hoping to net my first megabit prime.

Max