Welcome to the World Animal Day Challenge

A 5 day Challenge is being offered on PrimeGrid's The Riesel Problem (LLR) application. To participate in the Challenge, please select only the The Riesel Problem (LLR) project in your PrimeGrid preferences section. The challenge will begin 4 October 2013 18:00 UTC and end 9 October 2013 18:00 UTC. Application builds are available for Linux , Windows and MacIntel 32 bit and 64 bit. CPU's with AVX capabilities will be significantly faster than the ones without, as this instruction set allows for more computing power.

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. WU's will take ~6 hours on fast/newer computers and 12+ hours 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. :)

Please, please, please make sure your machines are up to the task.

Time zone converter:

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 to the left of the countdown clock.

Scoring Information

Scores will be kept for individuals and teams. Only work units issued AFTER 4 October 2013 18:00 UTC and received BEFORE 9 October 2013 18:00 UTC will be considered for credit. We will use a modified version of our credit algorithm which is based on the n value (k*b^n-1) and adjusted for the type of number and FFT size to score the challenge. The main difference is that the primary and double checker of a WU will receive the same score. (The FFT size adjustment, which will be used in this challenge, isn't yet included in the real credit function.)

Therefore, each completed WU will earn a unique score based on its n value. The higher the n, the higher the score. This is different than BOINC cobblestones! 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.

For details on how the score is calculated, please see this thread.

At the Conclusion of the Challenge

We would prefer users "moving on" to finish those tasks they have downloaded, if not then please ABORT the WU's instead of DETACHING, RESETTING, or PAUSING.

ABORTING WU's allows them to be recycled immediately; thus a much faster "clean up" to the end of an LLR Challenge. DETACHING, RESETTING, and PAUSING WU's causes them to remain in limbo until they EXPIRE. Therefore, we must wait until WU's expire to send them out to be completed.

Please consider either completing what's in the queue or ABORTING them. Thank you. :)

Hans Ivar Riesel (born 1929 in Stockholm) is a Swedish mathematician. In 1956, he showed that there are an infinite number of positive odd integer k's such that k*2^n-1 is composite (not prime) for every integer n>=1. These numbers are now called Riesel numbers. He further showed that k=509203 was such one.

It is conjectured that 509203 is the smallest Riesel number. The Riesel problem consists in determining that 509203 is the smallest Riesel number. To show that it is the smallest, a prime of the form k*2^n-1 must be found for each of the positive integer k's less than 509203. As of April 2011, there remains 56 k's for which no primes have been found. They are as follows:

2293, 9221, 23669, 31859, 38473, 40597, 46663, 67117, 74699, 81041, 93839, 97139, 107347, 121889, 129007, 143047, 146561, 161669, 192971, 206039, 206231, 215443, 226153, 234343, 245561, 250027, 252191, 273809, 304207, 315929, 319511, 324011, 325123, 327671, 336839, 342847, 344759, 362609, 363343, 364903, 365159, 368411, 371893, 384539, 386801, 397027, 398023, 402539, 409753, 444637, 470173, 474491, 477583, 485557, 494743, 502573

For a more detailed history and status of the Riesel problem, please visit Wilfrid Keller's The Riesel Problem: Definition and Status.

Additional Information
[list]

• Riesel Number (Wolfram MathWorld)
  
• Riesel Number (Wiki)
  
• Riesel Number (The Prime Glossary)
  

The Riesel problem is to k*2^n-1 as the Sierpinski problem is to k*2^n+1. There is no equivalent to the 'prime' Sierpinski problem since k=509203, the conjectured smallest Riesel number, is prime.

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:

• Lucas-Lehmer-Riesel test (WIKI)
  
• Download LLR by Jean Penné
  

(Edouard Lucas: 1842-1891, Derrick H. Lehmer: 1905-1991, Hans Riesel: born 1929).
____________
PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)

The vermin horde aim to be there complete with barbeque.

I'm up for the challenge too. Tim, if you're speaking for all of us Rats then you could have at least Photoshopped the tail onto a slightly higher part of the body. As it is, it isn't that flattering for any of us...

Yeah and it's clearly visible what in the picture you posted :P ;)
____________
PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)

That new big rat will make a big difference, thats for sure!
____________

That new big rat will make a big difference, thats for sure!

~ ~ ~ (, __,) ^ '>

A Bird is an Animal to ? , yeah, !

learn more :

http://youtu.be/9Gc4QTqslN4

nice Party at 4 October 2013 18:00 UTC and end 9 October 2013 18:00 UTC
____________

Congratulations on hijacking this thread for a discussion on rodent testicles.
Very appropriate for World Animal Day.

____________

Congratulations on hijacking this thread for a discussion on rodent testicles.
Very appropriate for World Animal Day.

Thanks. We are here all week. Try the veal and don't forget to tip the waitresses.

Will The Riesel Problem sieving count toward this challenge for non AVX capable cpus?
____________

The Riesel Problem Sieve won't count even if you run it on an abacus.

Ahhh ha i found the home of the smart as#@$ i should fit in nicely with you turd burgelers !

by the way thanks i wasnt sure by the way it was worded

Just a note: in the preferences the last challenge is still listed for trp sieve and the upcoming for trp llr is not.
____________
@AggieThePew

Shouldn't the server be loaded with much more TRP LLR work?
As of this moment I can see 187/600 WUs, not that much for a challenge?

Mike,

today in the evening, I will take 3.000 tasks, please note.
____________

not trp sieve ? Ok, I`ve seen it to late, also 300 tasks, hehe
____________

not trp sieve ? Ok, I`ve seen it to late, also 300 tasks, hehe

[DPC]Pyrus
I understand, and thanks

my Cache is empty
____________

Heinz Cetchup, andHeineken to the rats
____________

All ready for the Randy Show.

Before you get funny idea's that's cncr04s, with 8000 cores to throw into the challenge!
____________
Warped

All ready for the Randy Show.

Before you get funny idea's that's cncr04s, with 8000 cores to throw into the challenge!

8,000 cores will generate enough heat to cook an entire cow. Remember low and slow brings out the best in a bbq.

A cow is but a yummy series of interconnected steaks, roasts and burger bites!
____________
There's someone in our head but it's not us.

*sniff* *sniff*
I smell a prime on the horizon...

Any wild guess who will be the first to submit a completed WU?

I bet on Ross*.

Any wild guess who will be the first to submit a completed WU?

I bet on Ross*.

Did i misread? Looks like someones already turned in a unit - wscr

Any wild guess who will be the first to submit a completed WU?

I bet on Ross*.

Any wild guess who will be the first to submit a completed WU?

I bet on Ross*.

Looks like chip wins. :)

The result he's credited with in the challenge is in fact valid. (Oddly enough, his wingman uploaded the matching result BEFORE the challenge started, but hasn't reported it as completed yet.)

Hi
it was never going to me, as I work from 5am till noon [NZ time ] First boxes got turned on after 12pm , estimated time 7hrs.
How many points are we getting per WU? 1600 to 2000?
Cheers
Ross*

I hope Ross* is the first one in member list.
____________

Thanks to our team mate cncr04s Aggie The Pew invites everyone to the bbq. Bring your own drinks and we will provide rest.
____________
@AggieThePew

Hi all,

Not sure if this is a "big" problem - but I've been crunching some TRP LLR WU's for the challenge, but I don't appear in the list of participants here:

http://www.primegrid.com/challenge/2013_7/top_users.html

is this an oversight/error and maybe more crunchers are involved and more credits are being generated than is actually being shown ?

regards and bests

Tim
UBT - Timbo
UK BOINC Team
____________
regards,
Tim

UK BOINC Team Founder
Join the UK BOINC Team: http://www.ukboincteam.org.uk/uk-boinc-team.html

No new prime yet? It would be great to knock down some k during the challenge.
Any idea on the boost given to the TRP subproject leading edge?
____________
676754^262144+1 is prime

Hi,

Thanks for the info.

OK, so I can understand why not allowing WU's downloaded before the challenge might not be acceptable - coz a few might build up a big cache and hence could improve their position to a higher level by uploading results during the challenge period. :-(

It's just a shame that in my case, I don't have broadband or dial up available 24/7, so all I can do is to download WU's when I *do* have access and then resume/suspend specific projects when such challenges come up.

I won't abort all the WU's I have as they still need to be crunched plus it's now the 7th Oct and for any new WU's I download now, my 2 PC's (that take 24 hrs+ and 48hrs+ to complete each WU), may not have finished in time so they may not count towards the challenge total by the time the deadline is reached on the 9th.

Shame, but there you go.

Thanks again
Tim

Great news!

It must be almost 2M digits, right? a top 25 or so?


____________
676754^262144+1 is prime

I wonder who the "individual at the top of the challenge leader board" is =D
____________

Yea. A prime is found :)
Lennart

With 9-odd hours left, it's time to get those last units out and prepare for the end/clean up.

At the Conclusion of the Challenge

We would prefer users "moving on" to finish those tasks they have downloaded, if not then please ABORT the WU's instead of DETACHING, RESETTING, or PAUSING.

ABORTING WU's allows them to be recycled immediately; thus a much faster "clean up" to the end of an LLR Challenge. DETACHING, RESETTING, and PAUSING WU's causes them to remain in limbo until they EXPIRE. Therefore, we must wait until WU's expire to send them out to be completed.

Please consider either COMPLETING what's in the queue or ABORTING them. Thank you. :)

____________
PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)

Aggie The Power Pews.

Check eventvwr.

Me too re getting gold after cleanup.

And that's it guys and gals! :)

Thank you for all your hard work. Any and all help in the clean up is much appreciated though by no means obligatory.
____________
PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)

LMFAOOO!!!

Did you enjoy that feast Aggie? ;)

Time to update k count:

http://www.primegrid.com/prefs.php?subset=project
____________

I'm up to keep crunching trp llr, Might as well go for the double bronze now that I'm half the way there.
____________

Already 54, I guess :)
____________

I snuck in at 198th place, which I'm pretty pleased about! Am going to hang on for a few more days to turn the Bronze into a Silver.

I snuck in at 198th place, which I'm pretty pleased about! Am going to hang on for a few more days to turn the Bronze into a Silver.

woot
____________

I'd help if I could but I've had a failure of some kind and am away from home.

woot

And the overall stats have been updated too! :) PrimeGrid Challenge Overall standings
____________
PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)