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Message boards : Number crunching : Euler's Number Challenge

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Michael Gutierrez
Volunteer moderator
Project scientist

Joined: 21 Mar 17
Posts: 213
ID: 764476
Credit: 43,547,942
RAC: 12,362

Message 152286 - Posted: 16 Nov 2021 | 5:04:07 UTC

Welcome to Euler's Number Challenge

The eighth challenge of the 2021 Series will be a 3-day challenge in Thanksgiving™ of the anniversary of the introduction of e, or Euler's Number! The challenge will be offered on the AP27 Search subproject, beginning 23 November 05:00 UTC and ending 26 November 05:00 UTC.

2.71828182845904523536028747135266249775724709369995...
Euler's Number (not to be confused with Euler's Constant) is ubiquitous throughout seemingly unrelated fields of mathematics (not the least of which is prime numbers!) In reality, though, we've only been using this number since about 1690, and it only received its characteristic abbreviation e in Leonard Euler's letter to Christian Goldbach on November 25th, 1731.

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. 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 ~26 hours on average for CPUs and ~4 hours 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!

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 at the very top, above the countdown clock.

Scoring Information

Scores will be kept for individuals and teams. Only tasks issued AFTER 23 November 05:00 UTC and received BEFORE 26 November 05:00 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

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
____________

Time flies like an arrow. Fruit flies like a banana.

Michael Gutierrez
Volunteer moderator
Project scientist

Joined: 21 Mar 17
Posts: 213
ID: 764476
Credit: 43,547,942
RAC: 12,362

Message 152380 - Posted: 24 Nov 2021 | 7:19:10 UTC

1 day down, 2 days to go, and we're churning out tasks!

Challenge: Euler's Number
App: 11 (AP27)
(As of 2021-11-24 07:17:19 UTC)

139015 tasks have been sent out. [CPU/GPU/anonymous_platform: 24811 (18%) / 114204 (82%) / 0 (0%)]

Of those tasks that have been sent out:

2699 (2%) were aborted. [2424 (2%) / 275 (0%) / 0 (0%)]
1867 (1%) came back with some kind of an error. [95 (0%) / 1772 (1%) / 0 (0%)]
107398 (77%) have returned a successful result. [6652 (5%) / 100746 (72%) / 0 (0%)]
27054 (19%) are still in progress. [15640 (11%) / 11414 (8%) / 0 (0%)]

Of the tasks that have been returned successfully:

19749 (18%) are pending validation. [1408 (1%) / 18341 (17%) / 0 (0%)]
87587 (82%) have been successfully validated. [5241 (5%) / 82346 (77%) / 0 (0%)]
44 (0%) were invalid. [2 (0%) / 42 (0%) / 0 (0%)]
18 (0%) are inconclusive. [1 (0%) / 17 (0%) / 0 (0%)]
____________

Time flies like an arrow. Fruit flies like a banana.

Chooka

Joined: 15 May 18
Posts: 214
ID: 1014486
Credit: 426,681,853
RAC: 574,042

Message 152381 - Posted: 24 Nov 2021 | 9:26:29 UTC

It's great for the AP27 sub project that's for sure.

____________

Michael Gutierrez
Volunteer moderator
Project scientist

Joined: 21 Mar 17
Posts: 213
ID: 764476
Credit: 43,547,942
RAC: 12,362

Message 152386 - Posted: 25 Nov 2021 | 5:48:15 UTC

Entering day 3/3:

Challenge: Euler's Number
App: 11 (AP27)
(As of 2021-11-25 05:47:18 UTC)

246720 tasks have been sent out. [CPU/GPU/anonymous_platform: 37652 (15%) / 209068 (85%) / 0 (0%)]

Of those tasks that have been sent out:

3710 (2%) were aborted. [2950 (1%) / 760 (0%) / 0 (0%)]
4129 (2%) came back with some kind of an error. [108 (0%) / 4021 (2%) / 0 (0%)]
205897 (83%) have returned a successful result. [14241 (6%) / 191656 (78%) / 0 (0%)]
32987 (13%) are still in progress. [20353 (8%) / 12634 (5%) / 0 (0%)]

Of the tasks that have been returned successfully:

26896 (13%) are pending validation. [2033 (1%) / 24863 (12%) / 0 (0%)]
178885 (87%) have been successfully validated. [12205 (6%) / 166680 (81%) / 0 (0%)]
113 (0%) were invalid. [3 (0%) / 110 (0%) / 0 (0%)]
8 (0%) are inconclusive. [0 (0%) / 8 (0%) / 0 (0%)]
____________

Time flies like an arrow. Fruit flies like a banana.

JeppeSN

Joined: 5 Apr 14
Posts: 1563
ID: 306875
Credit: 36,253,296
RAC: 8,740

Message 152395 - Posted: 25 Nov 2021 | 22:36:02 UTC

VirtualLarry got his special badge and there was also one AP25. Will more long specimens show up in the last few hours of the challenge? /JeppeSN

Michael Gutierrez
Volunteer moderator
Project scientist

Joined: 21 Mar 17
Posts: 213
ID: 764476
Credit: 43,547,942
RAC: 12,362

Message 152396 - Posted: 26 Nov 2021 | 1:17:56 UTC

A few hours left in the challenge! Some friendly reminders... :)

At the Conclusion of the Challenge

When the challenge completes, we would prefer users "moving on" to finish those tasks they have downloaded, if not then please ABORT the WU's (and then UPDATE the PrimeGrid project) 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 a 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.

Likewise, if you're shutting down the computer for an extended period of time, or deleting the VM (Virtual Machine), please ABORT all remaining tasks first. Also, be aware that merely shutting off a cloud server doesn't stop the billing. You have to destroy/delete the server if you don't want to continue to be charged for it.

Thank you!
____________

Time flies like an arrow. Fruit flies like a banana.

Michael Gutierrez
Volunteer moderator
Project scientist

Joined: 21 Mar 17
Posts: 213
ID: 764476
Credit: 43,547,942
RAC: 12,362

Message 152397 - Posted: 26 Nov 2021 | 4:50:40 UTC

And we're done! Final stats below, cleanup starting now!

Challenge: Euler's Number
App: 11 (AP27)
(As of 2021-11-26 04:50:15 UTC)

338642 tasks have been sent out. [CPU/GPU/anonymous_platform: 45903 (14%) / 292739 (86%) / 0 (0%)]

Of those tasks that have been sent out:

8924 (3%) were aborted. [7318 (2%) / 1606 (0%) / 0 (0%)]
5072 (1%) came back with some kind of an error. [112 (0%) / 4960 (1%) / 0 (0%)]
296923 (88%) have returned a successful result. [22079 (7%) / 274844 (81%) / 0 (0%)]
27725 (8%) are still in progress. [16394 (5%) / 11331 (3%) / 0 (0%)]

Of the tasks that have been returned successfully:

27692 (9%) are pending validation. [2195 (1%) / 25497 (9%) / 0 (0%)]
269042 (91%) have been successfully validated. [19881 (7%) / 249161 (84%) / 0 (0%)]
181 (0%) were invalid. [3 (0%) / 178 (0%) / 0 (0%)]
14 (0%) are inconclusive. [0 (0%) / 14 (0%) / 0 (0%)]
____________

Time flies like an arrow. Fruit flies like a banana.

JH30895

Joined: 11 Jan 10
Posts: 16
ID: 53449
Credit: 1,251,056,037
RAC: 1,241,886

Message 152398 - Posted: 26 Nov 2021 | 5:10:55 UTC - in response to Message 152397.

Are you sure? This message appears to have gone out 10 minutes before the end of the challenge.

dannyridel
Volunteer tester

Joined: 3 Feb 19
Posts: 929
ID: 1097922
Credit: 22,022,067
RAC: 19,129

Message 152400 - Posted: 26 Nov 2021 | 7:02:44 UTC

What if two teams are tied at the end of the year?
At the current numbers, if AC finishes 80 points behind TAAT in the last challenge (P3 and P1) they will be level on points. Will the number of challenge wins be the determinant?
____________
SHSIDElectronicsGroup@outlook.com

waiting for a TdP prime...
Proth "SoB": 44243*2^440969+1

Eudy Silva

Joined: 26 Aug 17
Posts: 1607
ID: 918937
Credit: 354,083,118
RAC: 227,059

Message 152402 - Posted: 26 Nov 2021 | 10:27:52 UTC - in response to Message 152400.

What if two teams are tied at the end of the year?
At the current numbers, if AC finishes 80 points behind TAAT in the last challenge (P3 and P1) they will be level on points. Will the number of challenge wins be the determinant?

In case of ties, be it for teams or individuals, the tied entities end up sharing the same rank.
AFAIK, that's the way it was being done since 2008, when I took over generating these overall stats about 3 years ago.
I don't know in which order they'll appear in the table (need to inspect the Python code that generates the tables).

Edit: BTW, sharing rank positions for tied teams/inidividuals is what is currently being done within a challenge.
____________
"Accidit in puncto, quod non contingit in anno."
Something that does not occur in a year may, perchance, happen in a moment.

dannyridel
Volunteer tester

Joined: 3 Feb 19
Posts: 929
ID: 1097922
Credit: 22,022,067
RAC: 19,129

Message 152408 - Posted: 26 Nov 2021 | 20:47:25 UTC - in response to Message 152402.

What if two teams are tied at the end of the year?
At the current numbers, if AC finishes 80 points behind TAAT in the last challenge (P3 and P1) they will be level on points. Will the number of challenge wins be the determinant?

In case of ties, be it for teams or individuals, the tied entities end up sharing the same rank.
AFAIK, that's the way it was being done since 2008, when I took over generating these overall stats about 3 years ago.
I don't know in which order they'll appear in the table (need to inspect the Python code that generates the tables).

Edit: BTW, sharing rank positions for tied teams/inidividuals is what is currently being done within a challenge.

I see. Thanks!
____________
SHSIDElectronicsGroup@outlook.com

waiting for a TdP prime...
Proth "SoB": 44243*2^440969+1

Michael Gutierrez
Volunteer moderator
Project scientist

Joined: 21 Mar 17
Posts: 213
ID: 764476
Credit: 43,547,942
RAC: 12,362

Message 152419 - Posted: 28 Nov 2021 | 4:02:09 UTC

Cleanup Status:
Nov 27: 9854 tasks outstanding; 4781 affecting individual (259) scoring positions; 1969 affecting team (46) scoring positions.
____________

Time flies like an arrow. Fruit flies like a banana.

Message boards : Number crunching : Euler's Number Challenge