Die Leoniden sind ein Meteorschauer, der üblicherweise bis zu fünfzehn Meteore pro Stunde produziert. Etwa alle 33 Jahre steigt diese Anzahl auf Hunderte Meteore. Dies konnte das letzte Mal 2001 beobachtet werden. Dieser Schauer kann jährlich zwischen dem 06. und 30.11. beobachtet werden.
Wie nehme ich teil?
Zum Teilnehmen wählt nur das AP 27 (AP27) Projekt in euren PrimeGrid Einstellungen aus. Der Wettkampf wird am 17. November 2018 12:00 UTC beginnen und am 20th November 2018 12:00 UTC enden. Applikationen gibt es für Linux , Windows und MacIntel CPUs und GPUs. CPU Applikationen gibt es nur für 64-Bit CPUs. High-End Nvidia GPUs eignen sich am Besten für dieses Projekt.
Ich möchte wieder darauf hinweisen, daß es besonders für Kleincruncher, die nicht auf einen Platz in den vorderen 300 Rängen hoffen dürfen, attraktiv sein könnte, auf unseren Cluster-Account zu rechnen, um diesen nach oben zu pushen. Die derart errechneten Credits gehen in die Individualwertung des Cluster-Accounts sowie in die Teamwertung ein, nicht aber in eure eigene Individualwertung. Diese Credits verbleiben auch nach dem Wettbewerb beim Cluster-Account.
So rechnet ihr auf den Cluster-Account:
Um den schwachen Kontoschlüssel auf einem Computer zu verwenden, findet oder erstellt die 'Kontodatei' für dieses Projekt. Die Kontodatei für PrimeGrid ist account_www.primegrid.com.xml .
Als Inhalt tragt bitte Folgendes ein:
Code: Alles auswählen
<account>
<master_url>www.primegrid.com</master_url>
<authenticator>50088_a5854c4348d36141c50e1e4493bba7da</authenticator>
</account>
Übersetzung von Auszügen des nachstehenden, ursprünglich hier bekanntgegebenen englischen Originals sowie Ergänzungen von mir.
Welcome to the Leonids Shower Challenge
The Leonids is an average shower, producing up to 15 meteors per hour at its peak. This shower is unique in that it has a cyclonic peak about every 33 years where hundreds of meteors per hour can be seen. That last of these occurred in 2001. The Leonids is produced by dust grains left behind by comet Tempel-Tuttle, which was discovered in 1865. The shower runs annually from November 6-30. It peaks this year on the night of the 17th and morning of the 18th. The waxing gibbous moon will set shortly after midnight leaving fairly dark skies for what could be a good early morning show. Best viewing will be from a dark location after midnight. Meteors will radiate from the constellation Leo, but can appear anywhere in the sky.
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 17th November 2018 12:00 UTC and end 20th November 2018 12:00 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 17 November 2018 12:00 UTC and received BEFORE 20 November 2018 12:00 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 ChallengeFor more information about the AP27 search, please visit these links:
- 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.
- AP 27 Search
- AP 26 Search
- http://en.wikipedia.org/wiki/Arithmetic_progression
- Jens Kruse Andersen's Primes in Arithmetic Progression Records