PrimeGrid Challenge Series 2019

RFGuy_KCCO

DCOTM x4, [H]ard|DCer of the Year 2019
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World Maths Day Challenge
Announcing a new Challenge slot! To celebrate World Maths Day, and our new PPS-DIV sub-project, we'll be running a 5 day Challenge from 10th October 18:00 UTC until 15th October 18:00 UTC. Other Challenge dates are unaffected.

The Fermat Divisor search is especially designed to have a better chance of finding a Fermat Divisor. It has a limited number of candidates to check, and once they're gone, the project is over. A new Fermat Prime Divisor earns the finder a rare
fermat.png
badge. The project has found 18 primes so far, but no divisor.

For more information and discussion, read this forum thread or join our Discord server. 12 Sep 2019 | 11:52:29 UTC · Comment
 

pututu

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Ok, time to prep your GPUs for tomorrow PrimeGrid Oktoberfest challenge! Make sure you have plenty of beer next to you.

upload_2019-9-20_16-57-20.png


Starts on Sep 21st (Sat) at 4am/7am PST/EST.

Only sub-project AP27 is included. Tasks downloaded after the start of the challenge is counted but not before. No need to worry about wingman/wingwoman for points.

For more info, see here or below.

Welcome to the Oktoberfest Challenge!

The sixth Challenge of the 2019 Challenge series is a 5 day challenge to celebrate Oktoberfest. The challenge will be running on the AP27 Search.

Oktoberfest is the world's largest Volksfest (beer festival and travelling funfair). Held annually in Munich, Bavaria, Germany, it is a 16 to 18-day folk festival running from mid or late September to the first weekend in October, with more than six million people from around the world attending the event every year. Locally, it is often called the Wiesn, after the colloquial name for the fairgrounds, Theresa's meadows (Theresienwiese). The Oktoberfest is an important part of Bavarian culture, having been held since the year 1810. Other cities across the world also hold Oktoberfest celebrations that are modelled on the original Munich event.

During the event, large quantities of Oktoberfest Beer are consumed: during the 16-day festival in 2013, for example, 7.7 million litres were served. Visitors also enjoy numerous attractions, such as amusement rides, sidestalls, and games. There is also a wide variety of traditional foods available.

This year Oktoberfest will start on Saturday, September 21st. The Schottenhamel tent will be the place to be if you want to catch the official opening ceremonies. At noon, the Mayor of Munich will have the honor of tapping the first keg of Oktoberfest beer. Once the barrel has been tapped, all visitors will then be allowed to quench their thirst. The festival will go until Sunday, October 6th.

Arithmetic progressions
In mathematics, an arithmetic progression (AP) or arithmetic sequence is a sequence of numbers such that the difference between the consecutive terms is constant. For instance, the sequence 5, 7, 9, 11, 13, 15 … is an arithmetic progression with common difference of 2.

An arithmetic progression of primes is a sequence of primes with a common difference between any two successive numbers in the sequence. For example 3, 7, 11 is an arithmetic progression of 3 primes with a common difference of 4.

For an arithmetic progression (AP) of primes, AP-k is k primes of the form p + d*n for some d (the common difference between the primes) and k consecutive values of n. The above AP-3 is 3 + 4*n for n=0,1,2.

How to Participate?
To participate in the Challenge, please select only the AP 27 (AP27) project in your PrimeGrid preferences section. The challenge will begin 21st September 2019 11:00 UTC and end 26th September 2019 11:00 UTC. Application builds are available for Linux , Windows and MacIntel CPUs and GPUs. CPU apps are only available for 64 bit CPUs. High end Nvidia GPUs will have a very large advantage.

Tasks will take ~29 hours on average for CPUs and ~75 minutes on average for GPUs. If your computer is highly overclocked, please consider "stress testing" it. If you haven't run the AP app before, we strongly suggest running it before the challenge while you are monitoring the temperatures. You don't want to turn your machine into a meteor!

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 tasks issued AFTER 21 September 2019 11:00 UTC and received BEFORE 26 September 2019 11:00 UTC will be considered for credit. We will be using the same scoring method as we currently use for BOINC credits.
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.

At the Conclusion of the Challenge


  • We kindly ask users "moving on" to ABORT their tasks instead of DETACHING, RESETTING, or PAUSING.

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

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

For more information about the AP27 search, please visit these links:
- AP 27 Search
- AP 26 Search
- http://en.wikipedia.org/wiki/Arithmetic_progression
- Jens Kruse Andersen's Primes in Arithmetic Progression Records
 

EXT64

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My 3 GPUs are up and running. My buffer is set at almost zero so I should be good to go.
 

pututu

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Tornlogic, you need to move from GFN to AP27 sub-project. Need all the help we can get!

Balzac, you have any GPUs?
 
Last edited:

pututu

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After 12 hours of crunching, we are still holding at 3rd place with seven crunchers.


upload_2019-9-21_16-10-22.png
 

Tornlogic

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Hey, sorry guys. I didn't realize there was a challenge. I just switched EVERYTHING I have to AP.
I have 2 prolems tho. First problem I have now is that my main GPU is finishing a "Do you Feel Lucky Task" that's about 60% complete and I don't want to abort it. It's a 2080 Ti, so should be done by day's end.
Second problem is that one of my GPUs is getting a computational error immediately after starting the task. Temps are good, drivers are current, doesn't have problems running GFN tasks.. Any ideas?
 

motqalden

[H]ard|DCOTM Feb 2018, June 2019
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Hey, sorry guys. I didn't realize there was a challenge. I just switched EVERYTHING I have to AP.
I have 2 prolems tho. First problem I have now is that my main GPU is finishing a "Do you Feel Lucky Task" that's about 60% complete and I don't want to abort it. It's a 2080 Ti, so should be done by day's end.
Second problem is that one of my GPUs is getting a computational error immediately after starting the task. Temps are good, drivers are current, doesn't have problems running GFN tasks.. Any ideas?
Are you running in linux? if so you need to install open cl

sudo apt install ocl-icd-libopencl1
 

motqalden

[H]ard|DCOTM Feb 2018, June 2019
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Hmm i see you are not on linux. if you close and restart boinc is it showing detection of both cuda and opencl? in the event log?
 

pututu

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Hey, sorry guys. I didn't realize there was a challenge. I just switched EVERYTHING I have to AP.
I have 2 prolems tho. First problem I have now is that my main GPU is finishing a "Do you Feel Lucky Task" that's about 60% complete and I don't want to abort it. It's a 2080 Ti, so should be done by day's end.
Second problem is that one of my GPUs is getting a computational error immediately after starting the task. Temps are good, drivers are current, doesn't have problems running GFN tasks.. Any ideas?
Thanks for joining in. Better late than never and find those APs. We know this is your favorite project. Somehow we tried to get hold of you ;)
 

Tornlogic

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Thanks for joining in. Better late than never and find those APs. We know this is your favorite project. Somehow we tried to get hold of you ;)
Yea no problem. I really do feel bad I didn't join earlier.. that's just a stupid oversight on my part. My favorite project, is the one where it helps the team win!! Thanks for getting a hold of me in Discord!!!
 

Tornlogic

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my RTX 2080Ti will be finished with it's "Do you Feel Lucky" task in about 30 minutes, switching it over to AP.
 

pututu

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Holding on to 5th place with 1 day 20 hrs left in the race.

Currently I'm at 57th place, my best for the 2019 PG 2019 challenge series. Stats for previous race of this year can be found here.

upload_2019-9-24_7-19-53.png
 

motqalden

[H]ard|DCOTM Feb 2018, June 2019
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I have found 3 AP of length 23 so far this year which is the same as i found last year. still hoping for something bigger!
Also hoping to get my spot #20 back tonight after my CPU tasks come in :D

pututu your link is going to 2019 stats i think
 

Tornlogic

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Finally broke into the top 100 after getting a late start. Looks like I'll overtake EXT64, but don't believe I have enough muscle to take you out before the end of the challenge pututu. It was certainly worth a try. Nothing better than a little in-team competition to keep things lively!! :D
 

Tornlogic

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9 hours left. We will be fairly close to upsetting SETI Germany by that time. They seemed to have slowed down in recent hours. I have my fingers crossed.
 

motqalden

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that would be sweet. I am trying to eek out every last little bit i can in the last bit here.
 

motqalden

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Not holding my breath though as we have a little less than 6M points to make up :( looks like they are partially upset already as TAAT just bumped them to 4th spot
 

pututu

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Yea no problem. I really do feel bad I didn't join earlier.. that's just a stupid oversight on my part. My favorite project, is the one where it helps the team win!! Thanks for getting a hold of me in Discord!!!
The next PG race is CPU only and starts on Oct 10th. Hopefully you can join us again. We need all the help we can get.
 

Tornlogic

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Aug 8, 2016
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The next PG race is CPU only and starts on Oct 10th. Hopefully you can join us again. We need all the help we can get.
No worries, I'll be there for the team! CPU isn't my thing. I probably wont even break 100th place, but that project is what I was working on before I switched over to AP. So my systems will be crunching those tasks before the challenge begins.
 

motqalden

[H]ard|DCOTM Feb 2018, June 2019
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World Math Day challenge starts today at 11:00 AM PST / 2:00 PM EST

"The seventh Challenge of the 2019 Challenge series is a 5 day challenge to celebrate World Maths Day. The challenge is being offered on the new Fermat Divisor Search (PPS-DIV) (LLR) application.

Celebrated on October 15th each year, World Maths Day encourages students globally to take a break from standard math lessons giving them the opportunity to enjoy the beauty of mathematics by participating in maths-themed competitions, quizzes and games. It focuses on making mathematics interesting while also giving them an opportunity to win prizes and scholarships.

To participate in the Challenge, please select only the Fermat Divisor Search LLR (PPS-DIV) project in your PrimeGrid preferences section. The challenge will begin 10th October 2019 18:00 UTC and end at 15th October 2019 18:00 UTC."
 

pututu

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After 1 day and 21.8 hrs, we are at 5th place and likely to remain till the end of the challenge.

Not bad considering a team of 7 crunchers.

upload_2019-10-12_8-50-3.png
 
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