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Message boards : General discussion : PRPnet rally at No Prime Left Behind project: January 3-10

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mdettweiler
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Joined: 25 Apr 07
Posts: 271
ID: 7489
Credit: 7,398,464
RAC: 32
321 LLR Bronze: Earned 10,000 credits (10,279)Cullen LLR Bronze: Earned 10,000 credits (11,460)PPS LLR Bronze: Earned 10,000 credits (14,949)PSP LLR Bronze: Earned 10,000 credits (11,016)SoB LLR Bronze: Earned 10,000 credits (16,635)SGS LLR Bronze: Earned 10,000 credits (11,081)TRP LLR Bronze: Earned 10,000 credits (10,140)Woodall LLR Bronze: Earned 10,000 credits (10,331)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,883)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (21,464)PPS Sieve Bronze: Earned 10,000 credits (57,241)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,499)TRP Sieve (suspended) Bronze: Earned 10,000 credits (20,039)PSA Turquoise: Earned 5,000,000 credits (7,160,517)
Message 30076 - Posted: 28 Dec 2010 | 23:43:17 UTC

Hi all,

For those of you not familiar with the No Prime Left Behind project, is covers a good chunk of the k-ranges for Riesel primes (k*2^n-1)--the counterpart to PrimeGrid's Proth Prime Search (k*2^n+1). Since the inception of PrimeGrid's PPS effort, we have enjoyed a friendly rivalry between the two projects and a good deal of participant crossover. You can find more information in our forum at http://www.mersenneforum.org/forumdisplay.php?f=82, and specifically our welcome thread at http://www.mersenneforum.org/showthread.php?t=9887, which while admittedly rather out of date regarding active test ranges and the like, still gives a pretty good idea of what our priorities and philosophy are.

About once every month or two, we hold "rallies", which are much like PrimeGrid's Challenge Series. (I believe our rallies came first, but we don't mind--imitation is the sincerest form of flattery. :-)) The PrimeGrid admin squad has graciously allowed us to announce our rallies here in addition to the usual places (our own forum and a few team forums). Thanks Lennart for spearheading that! :-)

NPLB is not a BOINC project, so we don't even try to compete with PrimeGrid for #1 on the 5000 Largest Primes list. ;-) Instead we aim for second place, to be the premier non-BOINC prime search project on the web. We use much of the same software that PrimeGrid's off-BOINC Project Staging Area uses--PRPnet and LLRnet for primality testing, and ppsieve for sieving. In fact, both projects are currently collaborating on a sieve for k<10000, n=4M-6M which is being conducted jointly in NPLB's forum and in the PST forum here. (Previous phases of this sieve are now available in BOINC under the PPS Sieve subproject.)

Weeklong rallies seem to have gone over well the last few times, so this one will be for a week as well. The rally will start on Monday, January 3 at 7:00 PM GMT and finish 168 hours later on Monday, January 10 at 7:00 PM GMT. (For those of you who can't convert GMT to local time :-P, that's 3:00 PM EDT and 2:00 PM CDT.)

As mentioned above, we're using the same PRPnet software for our rally that PrimeGrid uses in the Project Staging Area. Many of you are therefore already familiar with the PRPnet client, and already have it set up on your machines; if not, you can get the latest version and instructions for using it in the PSA PRPnet thread. The only difference is that instead of PrimeGrid's server= lines as detailed in that thread, you'll need to use this one for NPLB:

server=NPLB_9000:100:1:noprimeleftbehind.net:9000

A cache size of 2-5 pairs is recommended (though 1 is also OK if you prefer). The tests will be in the vicinty of n=870K-900K during the rally and take about 10-15 minutes on my somewhat modern Core 2 Duo. Note that an LLRnet server is also available in the rally range (and the two will be included equally in the rally totals); I'm guessing most of you guys will use PRPnet since it's used here at PrimeGrid, but more information on our updated LLRnet client (which works at the same speed as PRPnet) and how to use it can be found here. LLRnet users should connect to server noprimeleftbehind.net port 3000.

Any primes you find should be reported as "[your name], NPLB, srsieve, psieve, LLR" at the top-5000 website. When you submit your first result to our server, at our next hourly stats update your username will be added to our stats database (see http://www.noprimeleftbehind.net for stats--during the rally the home page will change to an hourly breakdown of all pairs submitted on the rally servers). If you're using PRPnet, then one of the admins will get your email address out of the logs and add it to our database so you will receive automatic email notifications of primes; if you're on LLRnet, you'll need to email one of the admins so we can get you set up for notifications. (I can be reached at max@noprimeleftbehind.net.) You can also post in our teams thread to be added to the team of your choice (or start one if yours is not yet represented at NPLB).

Last rally, we had a surprise upset in the teams arena, with Raiders of the Lost Primes taking the championship title by a 20,000-test lead over PrimeSearchTeam (the victor in the previous two rallies). Most of the lead was due to one of our big contributors (Ian a.k.a. MyDogBuster) temporarily departing from his usual work at our sister project, Conjectures 'R Us, and making an appearance at the rally; whether he'll be here this time is known only to him, but PrimeSearchTeam may want to plan to bring some extra firepower to cover that contingency. ;-) (FYI: ROLP's output from last rally, including Ian, is just about the max that we can crank out. If you can top that, then you have a rally victory for sure, unless some other enterprising team can do even better. :-)) Free-DC made a very good showing, primarily driven by Brian a.k.a. PCZ, almost giving PrimeSearchTeam a real run for their money. If they can scrounge together a few more heavy hitters this time, they stand a decent chance at taking the title.

In the individual stats, Brian and Lennart (a.k.a. sm5ymt) had a very close race, with Lennart winning by just 1110 tests. Since both of them were cranking out much more than that per day (and near the end, PCZ was outputting just about that much more than Lennart each day), it was sufficiently close that had the rally gone on for another day, we may well have seen a different result.

If you have any questions about NPLB or the rally, or are interested in participating, please don't hesitate to post in our official rally thread at mersenneforum.org or here--both places will be monitored by the NPLB admin squad and responded to as quickly as possible. You can also email me at max@noprimeleftbehind.net to ask questions directly.

Hope to see you there!

Max :-)

mdettweiler
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Joined: 25 Apr 07
Posts: 271
ID: 7489
Credit: 7,398,464
RAC: 32
321 LLR Bronze: Earned 10,000 credits (10,279)Cullen LLR Bronze: Earned 10,000 credits (11,460)PPS LLR Bronze: Earned 10,000 credits (14,949)PSP LLR Bronze: Earned 10,000 credits (11,016)SoB LLR Bronze: Earned 10,000 credits (16,635)SGS LLR Bronze: Earned 10,000 credits (11,081)TRP LLR Bronze: Earned 10,000 credits (10,140)Woodall LLR Bronze: Earned 10,000 credits (10,331)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,883)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (21,464)PPS Sieve Bronze: Earned 10,000 credits (57,241)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,499)TRP Sieve (suspended) Bronze: Earned 10,000 credits (20,039)PSA Turquoise: Earned 5,000,000 credits (7,160,517)
Message 30260 - Posted: 3 Jan 2011 | 7:55:56 UTC

Just a reminder to anyone planning to participate in the rally: if you haven't done so already, please let us know (either by email or by forum post in the appropriate thread) if you have a team affiliation that you'd like to participate under--otherwise your contributions will be counted under team "-". Preferably, this should be done before the rally if at all possible to minimize fluctuation in the stats.

Hope to see you there! :-) It's shaping up to be a rather interesting competition on both the individual and team fronts, so a little contribution could make a big difference.
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Joined: 6 Mar 10
Posts: 151
ID: 56425
Credit: 34,290,031
RAC: 101
321 LLR Gold: Earned 500,000 credits (675,555)Cullen LLR Silver: Earned 100,000 credits (104,149)ESP LLR Silver: Earned 100,000 credits (102,660)Generalized Cullen/Woodall LLR Silver: Earned 100,000 credits (104,318)PPS LLR Amethyst: Earned 1,000,000 credits (1,078,960)PSP LLR Silver: Earned 100,000 credits (114,445)SoB LLR Silver: Earned 100,000 credits (107,305)SR5 LLR Silver: Earned 100,000 credits (102,729)SGS LLR Silver: Earned 100,000 credits (343,383)TRP LLR Silver: Earned 100,000 credits (266,129)Woodall LLR Silver: Earned 100,000 credits (111,291)321 Sieve (suspended) Silver: Earned 100,000 credits (207,656)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,160,719)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (504,653)PPS Sieve Jade: Earned 10,000,000 credits (16,964,996)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (201,564)TRP Sieve (suspended) Silver: Earned 100,000 credits (283,775)AP 26/27 Amethyst: Earned 1,000,000 credits (1,043,948)GFN Ruby: Earned 2,000,000 credits (2,811,621)PSA Turquoise: Earned 5,000,000 credits (5,000,175)
Message 30280 - Posted: 3 Jan 2011 | 17:12:54 UTC - in response to Message 30260.

I was wondering..... Thanks for the reminder ;)

My team is "Dutch Power Cows"
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mdettweiler
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Joined: 25 Apr 07
Posts: 271
ID: 7489
Credit: 7,398,464
RAC: 32
321 LLR Bronze: Earned 10,000 credits (10,279)Cullen LLR Bronze: Earned 10,000 credits (11,460)PPS LLR Bronze: Earned 10,000 credits (14,949)PSP LLR Bronze: Earned 10,000 credits (11,016)SoB LLR Bronze: Earned 10,000 credits (16,635)SGS LLR Bronze: Earned 10,000 credits (11,081)TRP LLR Bronze: Earned 10,000 credits (10,140)Woodall LLR Bronze: Earned 10,000 credits (10,331)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,883)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (21,464)PPS Sieve Bronze: Earned 10,000 credits (57,241)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,499)TRP Sieve (suspended) Bronze: Earned 10,000 credits (20,039)PSA Turquoise: Earned 5,000,000 credits (7,160,517)
Message 30288 - Posted: 3 Jan 2011 | 21:11:52 UTC - in response to Message 30280.

I was wondering..... Thanks for the reminder ;)

My team is "Dutch Power Cows"

Thanks--I've set your team in the database, as well as your email address for prime notifications (from the PRPnet logs).

mdettweiler
Avatar
Send message
Joined: 25 Apr 07
Posts: 271
ID: 7489
Credit: 7,398,464
RAC: 32
321 LLR Bronze: Earned 10,000 credits (10,279)Cullen LLR Bronze: Earned 10,000 credits (11,460)PPS LLR Bronze: Earned 10,000 credits (14,949)PSP LLR Bronze: Earned 10,000 credits (11,016)SoB LLR Bronze: Earned 10,000 credits (16,635)SGS LLR Bronze: Earned 10,000 credits (11,081)TRP LLR Bronze: Earned 10,000 credits (10,140)Woodall LLR Bronze: Earned 10,000 credits (10,331)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,883)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (21,464)PPS Sieve Bronze: Earned 10,000 credits (57,241)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,499)TRP Sieve (suspended) Bronze: Earned 10,000 credits (20,039)PSA Turquoise: Earned 5,000,000 credits (7,160,517)
Message 30780 - Posted: 11 Jan 2011 | 5:18:59 UTC

The rally concluded earlier today and I am pleased to report that it was an astounding success! :-D I've asked our stats admin to add a new graph to one of our stats pages that will tell whether this was truly our biggest rally yet (in terms of CPU time); the current graphs only show "bigness" in terms of # of candidates tested, which is not really useful in this context since we've done rallies on much smaller, faster-testing candidates in the past.

In the meantime, though, we had some AMAZING competitions throughout the rally, some of which ended up being very close. In the team standings, AMD Users pulled an enormous victory with 157903 candidates tested--which was absolutely enormous considering that the second place team, Raiders of the Lost Primes, "only" cranked out 48027. The second/third place race, by contrast, was extremely close: PrimeSearchTeam produced 47129 for a <900 candidate margin! :-0 This works out to a 1.9% margin between the two teams, one of our closest races yet. In fourth we had SETI.USA, a newcomer to NPLB, and after that Team-Goobee.org, Dutch Power Cows (also new), [no team], and Free-DC, in that order. (It's looking like next time Free-DC will do a lot better...this time things were a little off for them since a couple of their biggest contributors were repaying a CPU debt to AMD Users, from what I've heard.)

On the individual side, Brian (a.k.a. PCZ) came in first, followed by Lennart (a.k.a. sm5ymt), James (a.k.a. jamers), Vaughan, and Gary (a.k.a. gd_barnes). The rest of the individual stats are available here for all interested. (I came this close to getting 8th place...nah, I guess nobody's interested in that. ;-))

Perhaps most importantly, we covered an enormous amount of ground on the 6th Drive, going from n=870K all the way to 973K over the course of the rally, netting 25 new primes. At this point, it shouldn't take us long to clean up the remaining work to n=1M and finish the drive. A hearty thanks to all who made this possible! :-D

Once the 6th Drive completes, we will proceed right into the 7th Drive (on the same servers), for k=800-1001 over a similar n-range. Once that completes, all of k<1001 will be complete to n=1M, well ahead of our original goal (set at the founding of the project in early 2008) to do so by the end of 2011. We will then shift our focus to the n=1M-2M range and also getting the k=1400-2000 range to n=1M.

Our next rally will likely be sometime in late February or early March. If you're planning on coming, feel free to chime in with our discussion of exact date (which generally takes place in the previous rally's thead--in this case here) which will occur as that time grows closer.

Max :-)

Message boards : General discussion : PRPnet rally at No Prime Left Behind project: January 3-10

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