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Message boards : News : The Winter Solstice Challenge - Final

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JohnProject donor
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321 LLR Bronze: Earned 10,000 credits (11,773)Cullen LLR Bronze: Earned 10,000 credits (14,945)ESP LLR Bronze: Earned 10,000 credits (26,855)PPS LLR Bronze: Earned 10,000 credits (84,876)PSP LLR Bronze: Earned 10,000 credits (15,311)SoB LLR Bronze: Earned 10,000 credits (21,440)SR5 LLR Bronze: Earned 10,000 credits (29,270)SGS LLR Bronze: Earned 10,000 credits (26,616)TPS LLR (retired) Bronze: Earned 10,000 credits (36,288)TRP LLR Bronze: Earned 10,000 credits (41,655)Woodall LLR Bronze: Earned 10,000 credits (15,807)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,014)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (23,405)PPS Sieve Bronze: Earned 10,000 credits (36,192)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,306)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,738)GFN Bronze: Earned 10,000 credits (86,217)PSA Ruby: Earned 2,000,000 credits (2,143,756)
Message 29794 - Posted: 22 Dec 2010 | 5:42:46 UTC

The Winter Solstice is here!!! The solstice fires are the brightest they have ever been at PrimeGrid. The fuel came from an unprecedented amount of factors found. This Challenge benefited not only PrimeGrid's Proth Prime Search project but also the entire Riesel prime search community. A wonderful holiday gift to all those involved. :)

1.3P of sieve work was crunched in 434K tasks. A HUMONGOUS sieve that would have been impossible to do without Ken Brazier's help. A special thanks to him for his modifications to tpsieve as well as his port to GPU's.

Congratulations to Sicituradastra. as the top team and Steve* as the top individual. Remember, the top 100 individual and top 50 team places earn points for this Challenge. For more stats and information, please see this forum post.

This concludes PrimeGrid's 2010 Challenge Series. Overall final results will be posted soon. Thank you to everyone who participated this year. We wish you a Happy Holidays and hope to see you next year!
____________

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PSP LLR Bronze: Earned 10,000 credits (11,240)TRP LLR Bronze: Earned 10,000 credits (10,735)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (88,757)TRP Sieve (suspended) Bronze: Earned 10,000 credits (36,174)AP 26/27 Bronze: Earned 10,000 credits (16,749)PSA Bronze: Earned 10,000 credits (98,594)
Message 29806 - Posted: 22 Dec 2010 | 11:06:01 UTC - in response to Message 29794.

In which way did it benefit the riesel prime search? I thought it was only PPS sieve.

JohnProject donor
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Joined: 21 Feb 06
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321 LLR Bronze: Earned 10,000 credits (11,773)Cullen LLR Bronze: Earned 10,000 credits (14,945)ESP LLR Bronze: Earned 10,000 credits (26,855)PPS LLR Bronze: Earned 10,000 credits (84,876)PSP LLR Bronze: Earned 10,000 credits (15,311)SoB LLR Bronze: Earned 10,000 credits (21,440)SR5 LLR Bronze: Earned 10,000 credits (29,270)SGS LLR Bronze: Earned 10,000 credits (26,616)TPS LLR (retired) Bronze: Earned 10,000 credits (36,288)TRP LLR Bronze: Earned 10,000 credits (41,655)Woodall LLR Bronze: Earned 10,000 credits (15,807)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,014)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (23,405)PPS Sieve Bronze: Earned 10,000 credits (36,192)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,306)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,738)GFN Bronze: Earned 10,000 credits (86,217)PSA Ruby: Earned 2,000,000 credits (2,143,756)
Message 29819 - Posted: 22 Dec 2010 | 14:50:00 UTC - in response to Message 29806.
Last modified: 22 Dec 2010 | 14:58:56 UTC

In which way did it benefit the riesel prime search? I thought it was only PPS sieve.

From The results are Final! post:
    As a reminder, the sieve is 4<k<10000 and n<3M for k*2^n+1 and k*2^n-1.

Also, from the Top Sieve Priority post:

    RSP Sieve is a manual effort and is the "sister" project to the PPS and PPSE projects. Those projects sieve the k*2^n+1 form for 4<k<10000 and n<5M. RSP will sieve the k*2^n-1 form for 4<k<10000 and n<5M. This work will be made available to the many projects that search the -1 form. This is made possible through the use of Geoff Reynolds/Ken Brazier's tpsieve which basically allows the sieving of both forms for almost the same time it takes to sieve a single form. If you wish to participate in the RSP Sieve, register at the PST Forum to find out more details and to reserve work. PSA credit is available.

We made the switch a while back in BOINC with very little fanfare. It was mostly transparent to the user and required very little modifications server-side. As such, we simply kept the PPS (Sieve) name...although this may change in the future to PPR (Sieve) which is what we use in PSA to identify the combined sieve...Proth Prime Riesel sieve.

While it was posted in the PST forum (PSA work), I guess it was never "officially" announced in the PG forum. With Ken's modification to tpsieve and it taking almost the same time to do both forms, it just made sense to take advantage of this and provide support for the riesel prime search community.

In response to a question in the PST forum:

    Yes, there are several projects searching the riesel side. This effort is in support of those projects. The vision is that all the projects on the riesel side would get "free" sieving to a depth beyond what they can do on their own. It would be a shame not to take advantage of sieving both forms for almost the same time it would take sieving only one form.

This does not impact The Riesel Problem as that effort is searching for 63 specific k's, 61 of which are >10000. For the two k's <10000, the TRP (Sieve) is deeper.
____________

Message boards : News : The Winter Solstice Challenge - Final

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