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PostPosted: 07.12.2011, 20:52    (No subject) Reply with quoteBack to top

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GFN Prime Search Sieving
It has been a lukewarm response to the re-start of GFN sieving. This sieve will support 3 new N's in the GFN prime search (1048576, 2097152, 4194304). If you have Windows 64 bit and would like to put it to good use in a specialized sieve (one of which might eventually produce the world's largest prime), then please review these instructions.

This manual sieve is located in the Project Staging Area. It's a simple and straight forward process. For more details, please see this post.

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PostPosted: 26.12.2011, 08:07    (No subject) Reply with quoteBack to top

World Record Twin Primes
Quote:
On 25 Dec 2011 13:31:28 UTC, PrimeGrid’s Sophie Germain Prime Search found World Record Twin Primes: 3756801695685*2^666669±1

The twin primes are 200,700 digits long, eclipsing the previous record of 100355 digits. They will enter Chris Caldwell's The Largest Known Primes Database ranked 1st for twins. This is PrimeGrid's third record twin.

The discovery was made by Timothy D. Winslow of the United States using an Intel Core i7 920 @ 2.67GHz with 8 GB RAM running Windows 7 Ultimate. This computer, using LLR, took 9 minutes and 21 seconds to complete the primality tests of both primes. Timothy is a member of The Knights Who Say Ni! team.


Ich kanns nicht glauben und dann noch kurz vor Jahresende Shok

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PostPosted: 01.01.2012, 08:06    (No subject) Reply with quoteBack to top

Neue Projekte für PRPnet: Wieferich und Wall-Sun-Sun

server=WIEFERICH:50:1:prpnet.mine.nu:13000
server=WALLSUNSUN:50:1:prpnet.mine.nu:13001

Folgende Zeile noch in die ini mit eintragen

// This is the name of the executable used for Wieferich and Wall-Sun-Sun searches.
// Available ONLY to 64bit OS.  Uncomment if you have 64bit OS.
wwwwexe=wwww.exe


Achtung, PRPnet 5.02 ist Voraussetzung!

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PostPosted: 06.01.2012, 17:46    (No subject) Reply with quoteBack to top

GeneferCUDA wird gerade für BOINC getestet, also ein komplett neues Unterprojekt für Primegrid. Tester sind limitiert.

Auf Anfrage hier kann die Einstellung im Account freigeschaltet werden. Sobald ich meine habe, werde ich die Ergebnisse posten. Einen Validator gibt es bisher nicht!

Update:
99% GPU-Last, 4% CPU-Last

Range 8192 - 46s
Range 16384 - 1m36s
Range 32768 - 3m16s
Range 65536 - 8m5s
Range 131072 - 20m45s
Range 262144 - 57m48s
Range 524288 - 3h33m

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PostPosted: 09.01.2012, 16:23    (No subject) Reply with quoteBack to top

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AVX build of llr

Gary Craig, a member of Aggie The Pew, was successful in compiling an AVX version of LLR using gwnum v27.2 and LLR v3.8.6dev. We've been testing it for the past week with success. Depending on the LLR project, speed improvements range from 20% to 50%.


Gilt für:
•321 Prime Search
•Cullen Prime Search
•Prime Sierpinski Problem
•Proth Prime Search
•Seventeen or Bust
•Sophie Germain Prime Search
•The Riesel Problem
•Woodall Prime Search

Leider nur für Linux64 und MAC zur Zeit mit app_info.xml

Ich hoffe bald auch für ppselow @PRPnet auf Windows.

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PostPosted: 10.01.2012, 09:18    (No subject) Reply with quoteBack to top

Erste Laufzeiten in meiner vm:

PPSElow: 58s/30-36s
SGS: 9min/4min
TPS: 3,5min/1,5min

Das Ding geht ab wie Hölle. Die AVX ersetzt den core2 mode, den ich früher vermisst hatte, da die gnum die neuen CPUs nicht erkannt hatte und in den lahmen P4 mode ging. Der Zeitgewinn ist enorm!

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PostPosted: 12.01.2012, 07:39    (No subject) Reply with quoteBack to top

Kann leider noch nicht die neue pfwg-avx veröffentlichen, da die app bei einem primzahl-test abgeraucht ist. Der Client ging danach auch nicht mehr (5.0.4) Nur mit Hilfe des alten 4.3.7 gings dann wieder. Vielleicht ist der client inkompatibel. Wird jetzt 2 Tage lange mit 4.3.7 getestet. Hoffentlich findet der Entwickler von pfgw und prpnet den Fehler.
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PostPosted: 24.01.2012, 18:10    (No subject) Reply with quoteBack to top

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February is just a week away which means it is time for the 4th annual Tour de Primes. 2 is the first prime number...and the only even one. Therefore, we have declared February, the 2nd month, as prime month.

We're offering a small informal competition in tribute to this unique prime number. There are no points to be gained or awards to be won...just a simple rare jersey (Yellow, Green, and Polk-a-dot) at the end of the month to add to your badge collection. No pressure or stress other than what you put on yourself. :) For more information, please see Tour de Primes 2012.

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PostPosted: 24.01.2012, 20:08    (No subject) Reply with quoteBack to top

Neues zu den genefer screen lags/Einstellungen...

Quote:
There is now(*) a setting on the PrimeGrid preferences page called "GeneferCUDA Block Size". This can be used to vary the kernel size within Genefer.

Making this number larger increases the speed of the program, and reduces the amount of CPU usage, but may increase screen lag.

Decreasing this number may help with screen lag, but will slow the program and increase CPU usage.

The default value is zero, which lets Genefer choose the best value. That value is 8 for N <= 524288, is 9 for 1048576 <= N <2097152>= 4194304.

Usually, there will be no need to change this value. However, as we start searching the larger N values we will be working in an environment that is new, and it may be necessary to adjust these values. Therefore, it may be beneficial for this setting to be easily adjustable.

(*) If you can't find that setting on the preferences page, don't worry. This post is being written before the setting is implemented. The preferences page will contain a link to this explanation, so this has to be here before the setting can go live. Also, the GeneferCUDA version that supports this feature can't be tested until the preferences page supports the feature, so the setting won't actually be functional until that version of GeneferCUDA is released.

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PostPosted: 04.02.2012, 07:17    (No subject) Reply with quoteBack to top

Neuer PRPnet Port für Riesel Base 2 (The Riesel Problem)

server=TRPDC:100:5:prpnet.mine.nu:14000

Es wird ein kompletter Doublecheck vom Riesel Projekt durchgeführt, hierbei können wohl noch ca. 5 vergessene Primzahlen gefunden werden.

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PostPosted: 16.02.2012, 17:05    (No subject) Reply with quoteBack to top

Status-Report:

Quote:
The TRP sieve still has plenty of life in it. However, the CW sieve is approaching the end. The upcoming Leap Day Challenge will only shorten this time. An official shut down date will probably be announced after the Challenge and will be based on the work that was completed.

At most, there's only 6 months left. At the very least, a 4-6 week window will be given as advance notice before any "pausing of the sieve" is made.

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PostPosted: 21.02.2012, 19:29    (No subject) Reply with quoteBack to top

John verlässt Primegrid, leider D_upset

Forum

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PostPosted: 23.03.2012, 16:25    (No subject) Reply with quoteBack to top

Nach meinen Berechnungen wird der nächste SR5-Fund bei ca. n=730k liegen, wir sind bei n=717k. Mal gucken ob ich Recht habe, dauert dann aber 1-2 Monate.
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PostPosted: 04.04.2012, 18:08    (No subject) Reply with quoteBack to top

Lennart reduziert den Server (PRPnet):

port: prpnet2.mine.nu:12000 (PPSElow)

Nach fertigrechnen aller Pakete wird dieser Port eingestampft.

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PostPosted: 09.04.2012, 13:19    (No subject) Reply with quoteBack to top

SGS dürfte das nächste Projekt sein, was vielleicht in einem Monat entweder pausiert oder eingestampft wird. Diskussionen über einen anderen Suchbereich sind noch im Gange, entweder eine neue Twin-Prime oder doch die erste echte SGS. Somit dürfte auch der PRPnet Port für SGS nach Leerung beendet werden. Ich denke mal, das es kein neues Projekt geben wird, da die Ressourcen aufgrund der Kosten zurückgeschraubt werden.
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PostPosted: 13.04.2012, 18:20    (No subject) Reply with quoteBack to top

Nach meinem Tip mit dem n=730k Bereich lag ich leider etwas daneben, da eine weitere Zahl davor gefunden wurde.
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PostPosted: 17.04.2012, 15:27    (No subject) Reply with quoteBack to top

Da isse...

Quote:
On 9 April 2011 6:31:14 UTC, PrimeGrid’s Sophie Germain Prime Search found a World Record Sophie Germain prime: 18543637900515*2^666667-1 (2p+1: 18543637900515*2^666668-1)

The prime is 200,701 digits long, eclipsing the previous record of 79,911 digits. It enters Chris Caldwell's “The Largest Known Primes Database” ranked 1st for Sophie Germain primes.

The discovery was made by Philipp Bliedung (pabliedung) of the United States using an Intel Core i7 950 @ 3.07GHz with 12 GB RAM running Linux. Philipp is a member of the USA team.

The prime was verified on 9 April 2012 9:36:15 UTC, by Lee Blyth (IshtarIS) of Australia using an Intel Core i7 2600k @ 3.40GHz with 8 GB RAM running Windows 7 Ultimate. Lee is a member of the Ishtar team.


Es bleibt weiterhin offen, ob das SGS weitergeführt wird. Leider ist in letzter Zeit auch der PRPnet Port von SGS nicht erreichbar.

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PostPosted: 21.04.2012, 17:53    (No subject) Reply with quoteBack to top

rogue entwickelt gerade eine Open CL app für Wall-Sun-Sun, die soll 25x schneller als die CPU sein (getestet wahrscheinlich auf einer ATI), bin gespannt auf die Nvidia-Leistung. Wie immer nur bei PRPnet verfügbar.
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PostPosted: 22.04.2012, 06:53    (No subject) Reply with quoteBack to top

SGS für BOINC mit höherem Bereich wird jetzt gerade getestet. Später wird dann gesiebt.
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PostPosted: 14.05.2012, 18:34    (No subject) Reply with quoteBack to top

GCW Sieve reicht nur noch für 4 Wochen, danach beendet.
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