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Message boards : General discussion : Another 1-week PRPnet rally at No Prime Left Behind project

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mdettweiler
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Joined: 25 Apr 07
Posts: 271
ID: 7489
Credit: 7,404,609
RAC: 0
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 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 (7,166,662)
Message 27023 - Posted: 12 Oct 2010 | 4:16:29 UTC
Last modified: 12 Oct 2010 | 4:17:34 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 some participant crossover (primarily Lennart, who participates in most of our rally events). 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specifically our welcome thread at http://www.mersenneforum.org/showthread.php?t=9887, which while admittedly rather out of date regarding active test ranges and the like, still gives a pretty good idea of what our priorities and philosophy are.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<2M which is being conducted jointly in NPLB's forum and in the PST forum here (with PrimeGrid's half slated to move to BOINC in the near future).

Our last rally went for 1 week, which was a rather new concept at NPLB (previously our rallies had never gone longer than 48 hours). Since the last one was very well received, we've decided to do another week-long rally this time.

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 2-10 pairs is recommended (though 1 is also OK if you prefer). The tests will be in the vicinty of n=920K-950K during the rally and take about 13-15 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, 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 time PrimeSearchTeam blew Raiders of the Lost Primes (a conglomeration of NPLB participants similar in concept to PST) out completely out of the water. We're hoping to reverse that this time around, but we welcome any competition that wants to try for a different outcome. :-) The more, the merrier!

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: 7,404,609
RAC: 0
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 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 (7,166,662)
Message 27359 - Posted: 24 Oct 2010 | 18:27:05 UTC

Only 3 days to go before the start of the rally! If any of you are planning to participate and have your computers doing "big" workunits (>3 hours or so apiece), now is probably a good time to switch to something smaller so that you aren't stuck with tons of in-progress work on your hands when the rally starts.

If you've never used PRPnet before, I would recommend moving your machines early to allow some time to figure out the new software and work out any issues you may encounter. In my experience I have found PRPnet at least as easy (if not easier due to its greater simplicity) to run as BOINC; some of the console output can be a little intimidating at first if you're used to a slick graphical progress summary, but the basic idea is the same. If you have any questions about setting up the client or the project, feel free to drop me a line at max@noprimeleftbehind.net or a PM either here or at mersenneforum.org. (FYI, I prefer email as it tends to be easier to follow, especially compared to the spartan BOINC PM system, but can still manage with either.)

mdettweiler
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Send message
Joined: 25 Apr 07
Posts: 271
ID: 7489
Credit: 7,404,609
RAC: 0
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 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 (7,166,662)
Message 27421 - Posted: 27 Oct 2010 | 17:49:10 UTC

The rally will begin in ~1 hour--if you're going to participate, now is the time! :-)

mdettweiler
Avatar
Send message
Joined: 25 Apr 07
Posts: 271
ID: 7489
Credit: 7,404,609
RAC: 0
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 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 (7,166,662)
Message 27599 - Posted: 4 Nov 2010 | 7:16:04 UTC

The rally concluded earlier today (afternoon EDT), and I am pleased to say it was an amazing success! :-) We crunched a whopping 222,448 tests, which blew away all of our estimates for the rally and has put us within striking distance of completing the 5th Drive within 3 days--well in advance of our December 31 goal!

About halfway through the rally we moved to a new sieve file, sieved to p=75T+, courtesy of the joint PrimeGrid/NPLB RSP Sieve project (currently available through BOINC under the PPS Sieve moniker). While this helped out a little bit by leaving less candidates to be tested in the first place, the amount of LLR work done was enormous, and we found 17 new primes--which for n>920K is absolutely amazing! :-D Much thanks to all who particpated.

We had a surprise upset this time, with Raiders of the Lost Primes beating PrimeSearchTeam, 73988 tests to 53020. We had hardly expected this because of the amazing firepower Lennart was cranking out for PST, but one ROLP's heavy hitters came back from a long break from NPLB work (he had been doing mostly work on our sister project, Conjectures 'R Us, and some individual k's for the last year) and was enough to push us over to victory. PST folks take note: this is all we've got--every one of our heavy- and medium-hitters showed up for the rally this time, so all you have to do is top that and you can win for sure next time. :-)

In individual stats, Lennart came in 1st with 47747 tests, followed closely by PCZ of Free-DC with 46637 tests. In third place we had Gary, our main project admin and a member of ROLP, followed by MyDogBuster (ROLP) and Vaughan (AMD Users), all three of whom came in relatively close to each other in the end.

The full standings and hour-by-hour statistics for the rally can be found at http://www.noprimeleftbehind.net/stats/index.php?content=gauntlet_20101027.

With the 5th Drive on track to finish within 3 days, our next priority will be the 11th Drive: k=2000-3000 at n=~600K (just above entry-level on the top-5000, roughly analogous to PrimeGrid's PPSE LLR work). The goal will be to get that to n=670K, past the level of PrimeGrid's Sophie Germain Search effort, where we'll have some "breathing room" of a few months in which we won't have to constantly keep up with the rising top-5000 threshold. At that time we will switch to a new immediate priority to be determined.

We will likely have another rally sometime in January, probably again of week-long duration since that seems to have hit a "sweet spot" in which participants have enough time to stage stats upsets but isn't so long that people get bored. :-) This will likely be on our 11th Drive as mentioned above, so count on being able to find lots of top-5000 primes!

Max :-)

Message boards : General discussion : Another 1-week PRPnet rally at No Prime Left Behind project

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