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Message boards : Number crunching : Oktoberfest Challenge

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Joined: 27 Nov 11
Posts: 1116
ID: 120786
Credit: 262,152,205
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Found 1 prime in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,012,522)Cullen LLR Amethyst: Earned 1,000,000 credits (1,614,102)ESP LLR Ruby: Earned 2,000,000 credits (2,232,391)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,088,705)PPS LLR Ruby: Earned 2,000,000 credits (2,695,538)PSP LLR Ruby: Earned 2,000,000 credits (2,420,512)SoB LLR Amethyst: Earned 1,000,000 credits (1,780,064)SR5 LLR Ruby: Earned 2,000,000 credits (2,238,295)SGS LLR Ruby: Earned 2,000,000 credits (2,139,392)TRP LLR Ruby: Earned 2,000,000 credits (2,125,391)Woodall LLR Amethyst: Earned 1,000,000 credits (1,311,937)321 Sieve Turquoise: Earned 5,000,000 credits (5,190,731)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (207,387)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,049,697)PPS Sieve Double Bronze: Earned 100,000,000 credits (100,422,123)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,227,972)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,021,659)AP 26/27 Sapphire: Earned 20,000,000 credits (20,295,860)GFN Emerald: Earned 50,000,000 credits (56,786,203)PSA Sapphire: Earned 20,000,000 credits (43,298,465)
Message 132831 - Posted: 13 Sep 2019 | 22:56:07 UTC
Last modified: 14 Sep 2019 | 0:08:07 UTC

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
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Message boards : Number crunching : Oktoberfest Challenge

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