Dieser zweite der 2019er Wettbewerbe läuft fünf Tage, um das Jahr des Schweines zu feiern. Gerechnet wird die Generalized Cullen/Woodall Prime Search (LLR) Applikation.
Um teilzunehmen, wählt nur das Generalized Cullen/Woodall Prime Search LLR (GCW) Subprojekt in den PrimeGrid Einstellungen aus. Der Wettbewerb wird am 5. März 2019, 18:00 UTC beginnen und am 10. März 2019, 18:00 UTC enden. Gewertet werden ausschließlich Aufgaben, die während dieses Zeitraumes gezogen UND abgegeben wurden. Vor dem Wettbewerb zu bunkern, hat keinerlei positiven Effekt.
Applikationen gibt es für Linux 32 und 64 Bit, Windows 32 und 64 Bit sowie MacIntel.
CPUs, deren Befehlssatz AVX enthält, sind sinnvoll, und solche, deren Befehlssatz FMA3 enthält, dürften die besten Ergebnisse liefern.
LLR ist CPU-intensiv, stromhungrig und erzeugt viel Abwärme. Sorgt für ausreichende Kühlung eurer Rechner!
Es ist möglich, GCW mit Multi-Threading zu rechnen.
Ergänzt eure app_config.xml Datei (unter Windows typischerweise im Verzeichnis C:\ProgramData\BOINC\projects\www.primegrid.com\ ) mit den folgenden Zeilen bzw. legt sie bei Nichtvorhandensein selbst an:
Code: Alles auswählen
<app_config>
<app>
<name>llrGCW</name>
<fraction_done_exact/>
</app>
<app_version>
<app_name>llrGCW</app_name>
<cmdline>-t 4</cmdline>
<avg_ncpus>4</avg_ncpus>
</app_version>
</app_config>
Ich möchte wieder darauf hinweisen, daß es besonders für Kleincruncher, die nicht auf einen Platz in den vorderen 300 Rängen hoffen dürfen, attraktiv sein könnte, auf unseren Cluster-Account zu rechnen, um diesen nach oben zu pushen. Die derart errechneten Credits gehen in die Individualwertung des Cluster-Accounts sowie in die Teamwertung ein, nicht aber in eure eigene Individualwertung. Diese Credits verbleiben auch nach dem Wettbewerb beim Cluster-Account.
So rechnet ihr auf den Cluster-Account:
Um den schwachen Kontoschlüssel auf einem Computer zu verwenden, findet oder erstellt die 'Kontodatei' für dieses Projekt. Die Kontodatei für PrimeGrid ist account_www.primegrid.com.xml .
Als Inhalt tragt bitte Folgendes ein:
Code: Alles auswählen
<account>
<master_url>www.primegrid.com</master_url>
<authenticator>50088_a5854c4348d36141c50e1e4493bba7da</authenticator>
</account>
Bitte brecht am Ende des Wettkampes alles ab, was ihr nicht weiter berechnen möchtet.
Pausiert nicht die Aufgaben bzw. das Projekt, entfernt nicht das Projekt von euren Rechnern, und setzt es nicht einfach zurück. Schaltet eure Wettkampf-Rechner auch nicht einfach aus, oder beendet Boinc mit unfertigen Aufgaben, die dann auf der Festplatte vergammeln.
Nur durch das Abbrechen von unfertigen Aufgaben können diese möglichst bald neu ausgegeben und zeitnah berechnet werden, um das endgültige Ergebnis des Wettkampfes festzustellen.
Die Übersetzung bzw. Übertragung von Auszügen des untenstehenden, zuerst im PrimeGrid-Forum bekanntgemachten Textes wurde von mir nach bestem Wissen und Gewissen vorgenommen.
Auslassungen und Zusätze stammen ebenfalls aus meiner virtuellen Feder.
Welcome to the Year of the Pig Challenge
2019 is a Year of the Pig. In Chinese astrology, each year is related to a Chinese zodiac animal according to the 12-year cycle. The cycle of twelve corresponds to the twelve-year cycle of Jupiter. There are five types of Pigs, named after the Chinese elements. In order, they are: Metal, Water, Wood, Fire, and Earth. 2019 is an Earth Pig Year, starting on 5th February 2019 and ending on 24th January 2020. Earth Pigs are Communicative, popular among their friends, with a strong sense of time keeping. Famous Earth Pigs include Henry Ford and Arnold Schwarzenegger.
The second Challenge of the 2019 Challenge series is a 5 day challenge to celebrate the Year of the Pig. The challenge is being offered on the Generalized Cullen/Woodall Prime Search (LLR) application.
To participate in the Challenge, please select only the Generalized Cullen/Woodall Prime Search LLR (GCW) project in your PrimeGrid preferences section. The challenge will begin 5th March 2019 18:00 UTC and end at 10th March 2019 18:00 UTC.
Application builds are available for Linux 32 and 64 bit, Windows 32 and 64 bit and MacIntel. Intel CPUs with AVX capabilities (Sandy Bridge, Ivy Bridge, Haswell, Broadwell, Skylake, Kaby Lake, Coffee Lake) will have a very large advantage, and Intel CPUs with FMA3 (Haswell, Broadwell, Skylake, Kaby Lake, Coffee Lake) will be the fastest.
ATTENTION: The primality program LLR is CPU intensive; so, it is vital to have a stable system with good cooling. It does not tolerate "even the slightest of errors." Please see this post for more details on how you can "stress test" your computer. Tasks on one CPU core will take ~2 days on fast/newer computers and 10+ days on slower/older computers. If your computer is highly overclocked, please consider "stress testing" it. Sieving is an excellent alternative for computers that are not able to LLR.
Highly overclocked Haswell, Broadwell, Skylake, Kaby Lake or Coffee Lake (i.e., Intel Core i7, i5, and i3 -4xxx or better) computers running the application will see fastest times. Note that GCW is running the latest FMA3 version of LLR which takes full advantage of the features of these newer CPUs. It's faster than the previous LLR app and draws more power and produces more heat. If you have a Haswell, Broadwell, Skylake, Kaby Lake or Coffee Lake CPU, especially if it's overclocked or has overclocked memory, and haven't run the new FMA3 LLR before, we strongly suggest running it before the challenge while you are monitoring the temperatures.
Please, please, please make sure your machines are up to the task.
Multi-threading optimisation instructions
Those looking to maximise their computer's performance during this challenge, or when running LLR in general, may find this information useful.Time zone converter:
- * Your mileage may vary. Before the challenge starts, take some time and experiment and see what works best on your computer.
* If you have an Intel CPU with hyperthreading, either turn off the hyperthreading in the BIOS, or set BOINC to use 50% of the processors.* Use LLR's multithreaded mode. It requires a little bit of setup, but it's worth the effort. Follow these steps:
- *If you're using a GPU for other tasks, it may be beneficial to leave hyperthreading on in the BIOS and instead tell BOINC to use 50% of the CPU's. This will allow one of the hyperthreads to service the GPU.
- * Create a app_config.xml file in the directory C:\ProgramData\BOINC\projects\www.primegrid.com\ (or wherever your BOINC data directory is located). For a quad core CPU, the file should contain the following contents. Change the two occurrences of "4" to the number of actual cores your computer has.
[pre]<app_config>
<app>
<name>llrGCW</name>
<fraction_done_exact/>
</app>
<app_version>
<app_name>llrGCW</app_name>
<cmdline>-t 4</cmdline>
<avg_ncpus>4</avg_ncpus>
</app_version>
</app_config>[/pre]
* After creating the file, click on "Options/Read config files". You should then restart BOINC or reboot.
* The first time BOINC downloads an GCW task, it may act a little strange and download 4 tasks instead of 1. The run times on this first set of tasks may look a bit strange too. This is normal. This will also occur anytime BOINC downloads more than one task at a time. This can be avoided by setting "Use at most [ 1 ] % of the CPUs" before you download GCW tasks. After one task was downloaded, increase the percentage.
* Some people have observed that when using multithreaded LLR, hyperthreading is actually beneficial. We encourage you to experiment and see what works best for you.
The World Clock - Time Zone Converter
NOTE: The countdown clock on the front page uses the host computer time. Therefore, if your computer time is off, so will the countdown clock. For precise timing, use the UTC Time in the data section at the very top, above the countdown clock.
Scoring Information
Scores will be kept for individuals and teams. Only tasks issued AFTER 5th March 2019 18:00 UTC and received BEFORE 10th March 2019 18:00 UTC will be considered for credit. We will be using the same scoring method as we currently use for BOINC credits. A quorum of 2 is NOT needed to award Challenge score - i.e. no double checker. Therefore, each returned result will earn a Challenge score. Please note that if the result is eventually declared invalid, the score will be removed.
At the Conclusion of the ChallengeAbout the Generalized Cullen/Woodall Prime Search
- We kindly ask users "moving on" to ABORT their tasks instead of DETACHING, RESETTING, or PAUSING.
ABORTING tasks allows them to be recycled immediately; thus a much faster "clean up" to the end of an LLR Challenge. DETACHING, RESETTING, and PAUSING tasks causes them to remain in limbo until they EXPIRE. Therefore, we must wait until tasks expire to send them out to be completed.
Please consider either completing what's in the queue or ABORTING them. Thank you.
A Cullen number (first studied by Reverend James Cullen in 1905) is a number of the form n * 2^n + 1. A Woodall number (first studied by Allan Cunningham and H.J. Woodall in 1917) is a number of the form n * 2^n - 1.
Generalized Cullen and Woodall numbers are of the form n * b^n + 1 and n * b^n - 1, respectively, where n + 2 > b.
A couple of years ago PrimeGrid moved its search for Generalized Cullen and Generalized Woodall primes from PRPNet to BOINC. A double-check of all ranges searched by PRPNet has been completed by PrimeGrid, and is continuing on with new work running multiple bases (b values) concurrently and incrementing through n values.
PrimeGrid is sieving to a much larger n than has been previously done. The largest candidates will be in excess of 15,000,000 digits, and will be the same size as the largest candidates in the Seventeen or Bust project.
Once PrimeGrid finds a Generalized Cullen or Woodall on a base, it stops looking for Generalized Cullen or Woodall primes on that base, depending on the type found. For all the current bases, PrimeGrid will initially be searching only for Generalized Cullen Primes. For detail about the bases PrimeGrid will be searching (and has searched), you can go here: http://www.primegrid.com/forum_thread.p ... true#30718.
In addition to having found the largest known Cullen prime http://primes.utm.edu/primes/page.php?id=89536 and largest known Woodall prime http://primes.utm.edu/primes/page.php?id=124539, PrimeGrid has found the largest known Generalized Cullen prime, http://primes.utm.edu/primes/page.php?id=124515 and the 4th largest known Generalized Woodall prime http://primes.utm.edu/primes/page.php?id=98862.
For more information on Generalized Cullen and Woodall Numbers, you can go here: http://primes.utm.edu/top20/page.php?id=42 and here: http://primes.utm.edu/top20/page.php?id=45.
What is LLR?
The Lucas-Lehmer-Riesel (LLR) test is a primality test for numbers of the form N = k*2^n − 1, with 2^n > k. Also, LLR is a program developed by Jean Penne that can run the LLR-tests. It includes the Proth test to perform +1 tests and PRP to test non base 2 numbers. See also:(Edouard Lucas: 1842-1891, Derrick H. Lehmer: 1905-1991, Hans Riesel: 1929-2014).
- *Lucas-Lehmer-Riesel test (WIKI)
*Download LLR by Jean Penné