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Tour de Primes 2016

Gilthanis

Gilthanis

[H]ard|DCer of the Year - 2014
Joined
Jan 29, 2006
Messages
8,884
http://www.primegrid.com/forum_thread.php?id=6605#91286

This is NOT part of the 2016 challenge series. However it is possible to earn a special badge based on your resulsts.

The agenda is multi-factored. They are looking for the person with the best found prime and they are looking for the person that finds the most primes. Details are still being worked out but last year PPSE and SGS were the easiest project to find Primes in but wasn't as likely to find the highest prime. PPSE and SGS are shorter than most of the LLR work units, so most rigs should be able to run it fine.

Yellow Jersey - prime count leader
Green Jersey - points (prime score) leader
Polk-a-dot Jersey - on the designated day of February we'll have a "mountain" stage and award the Polk-a-dot Jersey to the one who finds the most primes on that day (tiebreaker will be prime score for that day).
Red Jersey - discoverer of largest prime
 
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I still haven't found any primes yet. I can't run any CPU tasks since it causes my CPU to run at a high temperature so I only use my 270X.
 
Well.. I've been with the project for several years. And though I haven't made it a top priority, I only have 3 primes. However, I have split the resources amongst all of the sub projects there... some are clearly easier to obtain than others. Hit SGS hard and you will have good chances in catching one.
 
Gilthanis said:
Well.. I've been with the project for several years. And though I haven't made it a top priority, I only have 3 primes. However, I have split the resources amongst all of the sub projects there... some are clearly easier to obtain than others. Hit SGS hard and you will have good chances in catching one.
Click to expand...

This. ^^^

It is very tough to find primes in Genefer, which is what I assume you are running on that 270X, since PPS (Sieve) won't find any primes at all (it is a sieving project only). I have well over 100 million points on Genefer and have yet to find a Genefer prime. However, as Gilthanis wrote, it is relatively easy to find primes in SGS. I have four primes found in the last several years of crunching PrimeGrid and all are on SGS. However, SGS is CPU only, so that rules it out for you, unfortunately.

By the way, which CPU do you run? PrimeGrid's CPU projects run hot because they use AVX/FMA3 instructions, which causes most CPU's to up their voltage a little and then they run hot. If you have a Haswell CPU, they get really hot because of this and the on-die VRM.
 
I have a Haswell i7-4770K. From what I read, the only way I am going to improve my thermal performance is if I delid which isn't something I want perform on a whim.
 
Sorry, just realized I should have looked at your signature (unless you just added that) for your CPU type. :eek:

One way you can limit the heat on the CPU is to reduce the number of cores in use. Try setting multi-processor usage to 50% in your BOINC preferences and see how that works for heat. That will limit PrimeGrid and any other CPU projects to only 4 work units at a time. If that is still too hot, lower the % further.
 
I am the finder of six primes and double checker of five more primes running SGS
One Prime for every 5000 WUs turned in. Seems like they are getting harder to find though.
PPS Proth Prime Search is another one where you stand a good chance of finding a prime.

One thing you want to do is do not keep a large number of WUs waiting to be crunched.
Set it to have 0.01 min and additional 0.01 days worth of work on hand.
This way it is turned in right a way. If it sits on you hard drive for hours, someone else can crunch it and turn it in before you. Then you are the double checker not the finder.
 
This event starts in 2 days. Remember not to download any work until the event actually starts or those work units wont count.

GPU's are most likely to find primes on GFN-16
CPU's PPSE and SGS are more likely to find primes.
 
I'm crunching on SR5 this month. After I hit 1 million points in that project, I am moving on to 321. I have little chance of finding a prime in either project, but I have personal goals to reach. Maybe I'll get lucky. :)
 
They have added a new jersey as well: Red Jersey - discoverer of largest prime
 
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