PrimeGrid's Birthday/Summer Solstice Challenge June 16-21

[Ken g6]

Just out of curiosity, how does this compare/contrast to what the GIMPS project is doing?

GIMPS is working on one particular form of numbers, 2^N-1. These numbers take less time to prove prime than any other numbers of the same size (as far as we know.) So that's why GIMPS has found the largest primes.

But there are other number forms that can be proven prime almost as fast. The second-largest primes recently have been found by the Seventeen or Bust project. The main reason they are the ones finding such large primes is that they have a setup that allows waiting weeks to prove a number prime.

Now, PrimeGrid is working on several, mostly smaller, prime searches. (I say mostly because you can do Seventeen or Bust work in PrimeGrid.) But for this particular race, take the Sierpinski problem statement from Seventeen or Bust, replace the "+" with a "-", and you have the Riesel problem.

Right now, in this race, we are working on sieving ("trial factoring" in GIMPS terms) for the Riesel problem.

 

[Ken g6]

Morning stats:

Rank___Credits____Username
60_____173040_____petrusbroder
112____98560______kimmyl
126____88760______biodoc
178____55440______Robert Everly
248____38640______Ken_g6
418____16800______zzuupp
465____12880______waffleironhead
1067___280________beefy337

Rank__Credits____Team
17____743680_____Crunching Family
18____716240_____Team Musketeers
19____715960_____Duke University
20____484400_____TeAm AnandTech
21____442960_____GPU Force
22____403480_____US Navy
23____360080_____Team China

We're still hanging on at 20th place. I think the other teams have a pretty insurmountable lead now. :|

And a late welcome to beefy337, submitting his first WU counted in this race.

 

[Ken g6]

Some nighttime stats before the end of the race:

Rank___Credits____Username
61_____198520_____petrusbroder
111____111160_____kimmyl
129____98560______biodoc
190____58240______Robert Everly
242____44800______Ken_g6
410____20440______zzuupp
489____12880______waffleironhead
863____1400_______Fardringle
1094___280________beefy337

Rank__Credits____Team
17____846720_____Crunching Family
18____828800_____Duke University
19____729960_____Team Musketeers
20____546280_____TeAm AnandTech
21____516880_____GPU Force
22____451360_____US Navy
23____427000_____AMD Users

It's still very close. Fardringle finally showed up with some work. And I just realized who's missing - where's SlangNRox?

 

[biodoc]

Just over 2 hours to go! Hopefully we can hold 20th place!

Thanks for the stats Ken_g6!!

 

[zzuupp]

IDK when the stats become final, but we've held on so far

 

[Ken g6]

The race is over and final!

Rank___Credits____Username
63_____206360_____petrusbroder
112____118160_____kimmyl
131____104720_____biodoc
192____60480______Robert Everly
243____47600______Ken_g6
403____22960______zzuupp
504____12880______waffleironhead
798____2240_______Fardringle
1268___280________beefy337

Rank__Credits____Team
17____892920_____Crunching Family
18____878920_____Duke University
19____730520_____Team Musketeers
20____575680_____TeAm AnandTech
21____554960_____GPU Force
22____485240_____US Navy
23____461720_____Team China

That was a close one! In the end, only 20,720 cobblestones separated us from GPU Force! But we held on for the 20th place finish. :thumbsup:

I hope you'll all come back for the nice, short Full Moon challenge, July 25 for just 24 hours.

 

[petrusbroder]

Thanks for the stats, Ken_g6! It was i tight race.

I do not know if I will be able to upgrade all my crunchers to 64-bit OS before the next race, but I'll upgrade all my more powerful crunchers: the 4 core ones (AMD and Intel) will be upgraded ASAP. I really need a boost in PrimeGrid. It would have made 350K for me in this race and the race would not be so close.

For my less powerful PC I think I'll use the latest Ubuntu (64-bit). Any disadvantage with that OS for PrimeGrid (compared with Win7)?

 

[Ken g6]

For my less powerful PC I think I'll use the latest Ubuntu (64-bit). Any disadvantage with that OS for PrimeGrid (compared with Win7)?

No disadvantage. I'm running Ubuntu 9.04; I need to try to upgrade to 10.04 sometime soon.

 

[Fardringle]

Sorry about the late entry. I completely forgot about this..

 

[biodoc]

No disadvantage. I'm running Ubuntu 9.04; I need to try to upgrade to 10.04 sometime soon.

I ran Ubuntu 10.04 on all 3 rigs for the race. Nice OS!

 

[Ken g6]

Well, at least you haven't posted in The TeAm's Great BBQ Recipe Compendium....

Better late than neffer!

In any case, I've added the next race to my sig, so you won't have an excuse next time.

 

[SlangNRox]

Sorry I didn't participate in teh race but its been too hot. Hopefully I'll be back in teh fall/winter