M.C. Escher's Birthday Challenge

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Welcome to M.C. Escher's Birthday Challenge

We adore chaos because we love to produce order... _.-`-._ _.-`-._' `-._ _.-`-._' `-._ _.-'| _.-`-._' `-._ _.-|_.-'_.-'`-._ _.-`-._' `-._ _.-|_.-'_.-|_.-' `-._ _.-`-._' `-._ _.-|_.-'_.-'_.-'_.-|-._ _.-| _.-'-._' `-._ _.-|_.-'_.-'_.-'_.-'_.-'_.-|-._`-._ _.-'_.-`-._ _.-' `_.-'-._ _.-|_.-'_.-'_.-'_.-'_.-'_.-'_.-'_.-|-._`-._|_.-' `-._ |-._ _.-' `_.-'-._'_.-'_.-'_.-'_.-'_.-'_.-'_.-|-._`-._`-._ _.-| |-._`-._|-._ _.-' `_.-'-._'_.-'_.-'_.-'_.-'_.-|-._`_.-'-._`-._ _.-'_.-| |-._`-._`-._`-._|-._ _.-' `_.-'-._'_.-'_.-'_.-|_.-' `-._|_.-'_.-| |-._`-._`-._`-._`-._`-._|-._ _.-' `_.-'-._'_.-|-._ _.-'_.-'_.-| |-._`-._`-._`-._`-._`-._`-._`-._|-._ _.-' `_.-'-._`-._ _.-'_.-'_.-'_.-| -._`-._`-._`-._`-._`-._`-._`-._`-._`-._|-._ _.-' `-._|_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._`-._`-._`-._`-._`-._|-._ _.-'_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._`-._`-._`-._`-._`-._`-._ _.-'_.-'_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._`-._`-._`-._`-._`-._|_.-'_.-'_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._`-._`-._`-._`-._|_.-'_.-'_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._`-._`-._`-._|_.-'_.-'_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._`-._`-._|_.-'_.-'_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._`-._|_.-'_.-'_.-'_.-'_.-'_.-| `-._`-._`-._`-._`-._`-._|_.-'_.-'_.-'_.-'_.-'_.-' `-._`-._`-._`-._`-._|_.-'_.-'_.-'_.-'_.-' `-._`-._`-._`-._|_.-'_.-'_.-'_.-' `-._`-._`-._|_.-'_.-'_.-' `-._`-._|_.-'_.-' `-._|_.-' Only those who attempt the absurd will achieve the impossible... -M.C. Escher

The fourth challenge of the 2022 Series will be a 5-day challenge marking the 124th birthday of Maurits Cornelis Escher, one of the world’s most famous graphic artists. His art is admired by millions of people worldwide, as can be seen by the many websites on the internet. (Seriously y'all, Escher was a really cool dude. Check out his gallery.) The challenge will be offered on the SR5-LLR application, beginning 17 June 13:00 UTC and ending 22 June 13:00 UTC.

To participate in the Challenge, please select only the Sierpinski/Riesel Base 5 Prime Search LLR (SR5) project in your PrimeGrid preferences section.

NOTE ON SR5 TASKS: If you've found a prime, the task will take about 10 times as long to run. This is because we always test SR5 candidates with a PRP (probable prime) check first, which runs much quicker. If that comes back positive, that means it's most likely prime but not certain (hence the 'probable'), so we run a full LLR primality test to verify, which takes a lot longer. TL;DR: If a task is taking an unusually long time, don't abort it!

Note on LLR2 tasks: LLR2 has eliminated the need for a full doublecheck task on each workunit, but has replaced it with a short verification task. Expect to receive a few tasks about 1% of normal length.

Application builds are available for Linux 32 and 64 bit, Windows 32 and 64 bit and MacIntel. Intel and recent AMD CPUs with FMA3 capabilities (Haswell or better for Intel, Zen-2 or better for AMD) will have a very large advantage, and Intel CPUs with dual AVX-512 (certain recent Intel Skylake-X and Xeon CPUs) will be the fastest.

Note that LLR is running the latest AVX-512 version of LLR which takes full advantage of the features of these newer CPUs. It's faster than the previous LLR app and draws more power and produces more heat, especially if they're highly overclocked. If you have certain recent Intel Skylake-X and Xeon CPUs, especially if it's overclocked or has overclocked memory, and haven't run the new AVX-512 LLR before, we strongly suggest running it before the challenge while you are monitoring the temperatures.

Multi-threading is supported and IS recommended. (SR5 tasks on one CPU core will take about 16-20 hours, with the exception of some older CPUs such as AMD Semprons, which may take up to 4 times longer than other LLR tasks.

Those looking to maximize their computer's performance during this challenge, or when running LLR in general, may find this information useful.

Your mileage may vary. Before the challenge starts, take some time and experiment and see what works best on your computer.
If you have a CPU with hyperthreading or SMT, either turn off this feature in the BIOS, or set BOINC to use 50% of the processors.
- If you're using a GPU for other tasks, it may be beneficial to leave hyperthreading on in the BIOS and instead tell BOINC to use 50% of the CPU's. This will allow one of the hyperthreads to service the GPU.
The new multi-threading system is now live. Click here to set the maximum number of threads. This will allow you to select multi-threading from the project preferences web page. No more app_config.xml. It works like this:
- In the preferences selection, there are selections for "max jobs" and "max cpus", similar to the settings in app_config.
- Unlike app_config, these two settings apply to ALL apps. You can't chose 1 thread for SGS and 4 for SoB. When you change apps, you need to change your multithreading settings if you want to run a different number of threads.
- There will be individual settings for each venue (location).
- This will eliminate the problem of BOINC downloading 1 task for every core.
- The hyperthreading control isn't possible at this time.
- The "max cpus" control will only apply to LLR apps. The "max jobs" control applies to all apps.
If you want to continue to use app_config.xml for LLR tasks, you need to change it if you want it to work. Please see this message for more information.
Some people have observed that when using multithreaded LLR, hyperthreading is actually beneficial. We encourage you to experiment and see what works best for you.

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 17 June 2022 13:00 UTC and received BEFORE 22 June 2022 13:00 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

completing what's in the queue

About the SR5 Project

Sierpinski Base 5

k = 6436, 7528, 10918, 26798, 29914, 31712, 36412, 41738, 44348, 44738, 45748, 51208, 58642, 60394, 62698, 64258, 67612, 67748, 71492, 74632, 76724, 83936, 84284, 90056, 92906, 93484, 105464, 126134, 139196, 152588

Riesel Base 5 - The smallest even Riesel base 5 number is suggested to be k=346802. To prove this, it is sufficient to show that k*5^n-1 is prime for each even k < 346802. This has currently been achieved for all even k, with the exception of the following 59 values (as of 2 February 2022):

k = 4906, 23906, 26222, 35248, 52922, 63838, 64598, 68132, 71146, 76354, 81134, 92936, 102952, 109238, 109862, 127174, 131848, 134266, 136804, 143632, 145462, 145484, 146756, 147844, 151042, 152428, 154844, 159388, 164852, 170386, 170908, 177742, 182398, 187916, 189766, 190334, 195872, 201778, 204394, 206894, 213988, 231674, 239062, 239342, 246238, 248546, 259072, 265702, 267298, 271162, 285598, 285728, 298442, 304004, 313126, 318278, 325922, 335414, 338866

History
Robert Smith originally presented the idea of a Sierpinski/Riesel base 5 search on 17 September 2004, in the primeform yahoo group. Using {3,7,13,31,601} as the covering set, he proposed that k=346802 is the smallest Riesel base 5 number. Shortly afterwards, Guido Smetrijns proposed that k=159986 is the smallest Sierpinski base 5 number.

After doing most of the initial work himself, Robert posted in the mersenneforum.org on 28 September 2004, and thus, the distributed effort began. Other principle players in the development, management, and growth of the project are Lars Dausch, Geoff Reynolds, Anand S Nair, and Thomas Masser.

Primes found by PrimeGrid

273662*5^3493296-1 found by Lukas Plätz on 7 December 2021 | Official Announcement
102818*5^3440382-1 found by Wes Hewitt on 8 October 2021 | Official Announcement
109838*5^3168862-1 found by Erik Veit on 13 August 2020 | Official Announcement
118568*5^3112069+1 found by Honza Cholt on 1 May 2020 | Official Announcement
207494*5^3017502-1 found by Todd Pickering on 16 March 2020 | Official Announcement
238694*5^2979422-1 found by Chris Howell on 12 March 2020 | Official Announcement
146264*5^2953282-1 found by Wolfgang Schwieger on 9 March 2020 | Official Announcement
35816*5^2945294-1 found by Pavel Atnashev on 5 March 2020 | Official Announcement
322498*5^2800819-1 found by Jordan Romaidis on 23 June 2019 | Official Announcement
88444*5^2799269-1 found by Scott Brown on 21 June 2019 | Official Announcement
138514*5^2771922+1 found by Ken Ito on 26 April 2019 | Official Announcement
194368*5^2638045-1 found by Honza Cholt on 15 August 2018 | Official Announcement
66916*5^2628609-1 found by Honza Cholt on 29 July 2018 | Official Announcement
81556*5^2539960+1 found by Jiří Bočan on 20 June 2018 | Official Announcement
327926*5^2542838-1 found by Seiya Tsuji on 19 June 2018 | Official Announcement
301562*5^2408646-1 found by Håkan Lind on 17 September 2017 | Official Announcement
171362*5^2400996-1 found by Frank Schwegler on 25 August 2017 | Official Announcement
180062*5^2249192-1 found by Stefan Larsson on 20 August 2016 | Official Announcement
53546*5^2216664-1 found by Tom Greer on 30 May 2016 | Official Announcement
296024*5^2185270-1 found by Steven Wong on 25 March 2016 | Official Announcement
92158*5^2145024+1 found by Karl Burridge on 15 March 2016 | Official Announcement
77072*5^2139921+1 found by Wolfgang Becker on 6 March 2016 | Official Announcement
306398*5^2112410-1 found by André Ahlfors Dahl on 11 January 2016 | Official Announcement
154222*5^2091432+1 found by Scott Brown on 10 November 2015 | Official Announcement
100186*5^2079747-1 found by Toshitaka Kumagai on 21 October 2015 | Official Announcement
144052*5^2018290+1 found by Wolfgang Schmidt on 23 May 2015 | Official Announcement
109208*5^1816285+1 found by Scott Brown on 18 October 2014 | Official Announcement
325918*5^1803339-1 found by Jörg Meili on 21 September 2014 | Official Announcement
133778*5^1785689+1 found by Guo Hua Miao on 17 August 2014 | Official Announcement
24032*5^1768249+1 found by Hiroyuki Okazaki on 23 July 2014 | Official Announcement
138172*5^1714207-1 found by Walter Darimont on 27 June 2014 | Official Announcement
22478*5^1675150-1 found by Guo Hua Miao on 19 June 2014 | Official Announcement
326834*5^1634978-1 found by Scott Brown on 25 April 2014 | Official Announcement
207394*5^1612573-1 found by Honza Cholt on 9 April 2014 | Official Announcement
104944*5^1610735-1 found by Brian Smith on 9 April 2014 | Official Announcement
330286*5^1584399-1 found by Scott Brown on 21 March 2014 | Official Announcement
22934*5^1536762-1 found by Keishi Toda on 6 February 2014 | Official Announcement
178658*5^1525224-1 found by Keishi Toda on 31 January 2014 | Official Announcement
59912*5^1500861+1 found by Raymond Ottusch on 17 January 2014 | Official Announcement
37292*5^1487989+1 found by Stephen R Cilliers on 29 December 2013 | Official Announcement
173198*5^1457792-1 found by Motohiro Ohno on 4 December 2013 | Official Announcement
245114*5^1424104-1 found by David Yost on 1 November 2013
175124*5^1422646-1 found by David Yost on 31 October 2013
256612*5^1335485-1 found by Wolfgang Schwieger on 4 August 2013
268514*5^1292240-1 found by Raymond Schouten on 16 July 2013
243944*5^1258576-1 found by Tod Slakans on 5 July 2013
97366*5^1259955-1 found by Jörg Meili on 4 July 2013
84466*5^1215373-1 found by Raymond Schouten on 29 June 2013
150344*5^1205508-1 found by Randy Ready on 28 June 2013
1396*5^1146713-1 found by Randy Ready on 23 June 2013
17152*5^1131205-1 found by Bob Benson on 22 June 2013
92182*5^1135262+1 found by Randy Ready on 21 June 2013
329584*5^1122935-1 found by Stephen R Cilliers on 21 June 2013
305716*5^1093095-1 found by Randy Ready on 18 June 2013
130484*5^1080012-1 found by Randy Ready on 17 June 2013
97768*5^987383-1 found by Ulrich Hartel on 17 June 2013
55154*5^1063213+1 found by Senji Yamashita on 16 June 2013
243686*5^1036954-1 found by Katsumi Hirai on 16 June 2013
70082*5^936972-1 found by Scott Brown on 30 May 2013
102976*5^929801-1 found by David Yost on 9 May 2013
110488*5^917100+1 found by Ronny Willig on 25 March 2013
162434*5^856004-1 found by Predrag Kurtovic on 10 January 2013
174344*5^855138-1 found by Ronny Willig on 9 January 2013
57406*5^844253-1 found by David Yost on 7 November 2012
48764*5^831946-1 found by David Yost on 12 October 2012
162668*5^785748-1 found by Lennart Vogel on 3 July 2012
289184*5^770116-1 found by David Yost on 7 June 2012
11812*5^769343-1 found by Göran Schmidt on 2 June 2012
316594*5^766005-1 found by Michael Becker on 30 May 2012
340168*5^753789-1 found by Kimmo Myllyvirta on 18 May 2012
338948*5^743996-1 found by Ricky L Hubbard on 7 May 2012
18656*5^735326-1 found by Lennart Vogel on 3 May 2012
5374*5^723697-1 found by Kelvin Lewis on 13 April 2012
72532*5^708453-1 found by Göran Schmidt on 7 February 2012
2488*5^679769-1 found by Sascha Beat Dinkel on 24 November 2011
331882*5^674961-1 found by Ronny Willig on 11 November 2011
27994*5^645221-1 found by Philipp Bliedung on 18 July 2011
262172*5^643342-1 found by Kimmo Myllyvirta on 13 July 2011
49568*5^640900-1 found by Sascha Beat Dinkel on 1 July 2011
270748*5^614625-1 found by Puzzle Peter on 14 February 2011
266206*5^608649-1 found by Puzzle Peter on 10 February 2011
210092*5^618136-1 found by Puzzle Peter on 31 January 2011
301016*5^586858-1 found by Puzzle Peter on 24 January 2011

Primes found by SR5 since collaboration

109988*5^544269+1 found by ltd on 23 April 2011
68492*5^542553+1 found by ltd on 24 April 2011

Primes found by others

3622 * 5^7558139-1 found by Ryan Propper on 18 February 2022
114986*5^1052966-1 found by Sergey Batalov on 3 June 2013
119878*5^1019645-1 found by Sergey Batalov on 3 June 2013

What is LLR?

The Lucas-Lehmer-Riesel (LLR) test is a primality test for numbers of the form N = k*2^n − 1, with 2^n > k. Also, LLR is a program developed by Jean Penne that can run the LLR-tests. It includes the Proth test to perform +1 tests and PRP to test non base 2 numbers. See also:

Lucas-Lehmer-Riesel test (WIKI)
Download LLR by Jean Penné

What is LLR2?

LLR2 is an improvement to the LLR application developed by our very own Pavel Atnashev and stream. It utilizes Gerbicz checks to enable the Fast DoubleCheck feature, which will nearly double the speed of PrimeGrid's progress on the projects it's applied to. For more information, see this forum post.
____________

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

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I hope I can post to say that the image is really good and must have taken a bit of work to get there.

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Dave

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I hope I can post to say that the image is really good and must have taken a bit of work to get there.

Welcome to 1994.

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I hope I can post to say that the image is really good and must have taken a bit of work to get there.

Welcome to 1994.

I think I was meaning something different.

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Nice. See also Penrose stairs. /JeppeSN

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Nice. See also Penrose stairs. /JeppeSN

The back quarter goes up for me - possibly so my mind doesn't explode.
This is appropriate I think - the Shepard Tone.
Look it up before listening to it.

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Each prime here gives a badge.

We found an SR5 prime already which is currently being processed (as mentioned on our Discord server), so k=64598 is eliminated from Riesel base 5, https://primes.utm.edu/primes/page.php?id=134054!

/JeppeSN

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Hopefully this is a useful reminder - to pause Windows updates for a week.
It seems an update has just happened, but always useful to pause them during a challenge.
I took the eye off the ball and didn't notice for about 6-7 hours where 2 computers were slacking off due to the last update.

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Dave

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Get them out the way now.

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The new prime was processed and can now be found on:
https://www.primegrid.com/primes/primes.php?project=SR5
and:
https://www.primegrid.com/stats_sr5_llr.php

Let us see if we also find some during the challenge.

/JeppeSN

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bill1024
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Good luck everyone, hope you find a prime.

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Stats from day 1!

Challenge: M.C. Escher's Birthday
App: 19 (SR5-LLR)
Fast DC tasks are NOT included.
(As of 2022-06-18 16:22:03 UTC)

58351 tasks have been sent out. [CPU/GPU/anonymous_platform: 57830 (99%) / 0 (0%) / 521 (1%)]

Of those tasks that have been sent out:

6240 (11%) were aborted. [6240 (11%) / 0 (0%) / 0 (0%)]
640 (1%) came back with some kind of an error. [640 (1%) / 0 (0%) / 0 (0%)]
16235 (28%) have returned a successful result. [15771 (27%) / 0 (0%) / 464 (1%)]
35236 (60%) are still in progress. [35179 (60%) / 0 (0%) / 57 (0%)]

Of the tasks that have been returned successfully:

2374 (15%) are pending validation. [2305 (14%) / 0 (0%) / 69 (0%)]
13861 (85%) have been successfully validated. [13466 (83%) / 0 (0%) / 395 (2%)]
0 (0%) were invalid. [0 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]

The current leading edge (i.e., latest work unit for which work has actually been sent out to a host) is n=3876093. The leading edge was at n=3794497 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 2.15% as much as it had prior to the challenge!
____________

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We've managed to push the leading edge of SR5 back into the top 100 primes if one were to be found. Hopefully the challenge ends up giving it a good buffer for a while so that it does not fall out again.
____________

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I am in a bad mood.
My modem died.
As I haven't upgraded my main PC with a new mb it doesn't have WIFI due to the card having lost it.
My back-up internet is intermittent.
I am nearly at the point of that excellent office worker that lost it at the printer/photocopier - grabbed his monitor and attempted to photocopy from his screen.

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mikey

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I am in a bad mood.
My modem died.
As I haven't upgraded my main PC with a new mb it doesn't have WIFI due to the card having lost it.
My back-up internet is intermittent.
I am nearly at the point of that excellent office worker that lost it at the printer/photocopier - grabbed his monitor and attempted to photocopy from his screen.

Do you have a pc close with wifi you can share the connection with? I had to do that where one pc had wifi and I shared the internet connection with a 2nd pc that did not have wifi, thru the one that did have wifi, thru a standard internet cable plugged into both pc's.

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I am in a bad mood.
My modem died.
As I haven't upgraded my main PC with a new mb it doesn't have WIFI due to the card having lost it.
My back-up internet is intermittent.
I am nearly at the point of that excellent office worker that lost it at the printer/photocopier - grabbed his monitor and attempted to photocopy from his screen.

Do you have a pc close with wifi you can share the connection with? I had to do that where one pc had wifi and I shared the internet connection with a 2nd pc that did not have wifi, thru the one that did have wifi, thru a standard internet cable plugged into both pc's.

I tried that a week or 2 ago - for a different reason - and gave up.
But yeah! Back in business (please I hope I haven't jinxed it)
The box on the side of the house was the problem, which happened to lose it when I unplugged the power to the modem (National Broadband modem).
The modem was also replaced.

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As was revealed on our Discord server, we have a challenge prime:

63838*5^3887851 - 1 by freestman!

/JeppeSN

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Less than 2 days remain, here are the stats

Challenge: M.C. Escher's Birthday
App: 19 (SR5-LLR)
Fast DC tasks are NOT included.
(As of 2022-06-20 18:00:44 UTC)

116595 tasks have been sent out. [CPU/GPU/anonymous_platform: 115171 (99%) / 0 (0%) / 1424 (1%)]

Of those tasks that have been sent out:

8805 (8%) were aborted. [8805 (8%) / 0 (0%) / 0 (0%)]
1227 (1%) came back with some kind of an error. [1227 (1%) / 0 (0%) / 0 (0%)]
61515 (53%) have returned a successful result. [60146 (52%) / 0 (0%) / 1369 (1%)]
45048 (39%) are still in progress. [44993 (39%) / 0 (0%) / 55 (0%)]

Of the tasks that have been returned successfully:

14593 (24%) are pending validation. [14280 (23%) / 0 (0%) / 313 (1%)]
46922 (76%) have been successfully validated. [45866 (75%) / 0 (0%) / 1056 (2%)]
3 (0%) were invalid. [3 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]

The current leading edge (i.e., latest work unit for which work has actually been sent out to a host) is n=3965396. The leading edge was at n=3794497 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 4.50% as much as it had prior to the challenge!
____________

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lunchboxkwdm
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Did everyone bunker tasks for this one? I've never seen this many "proof task not available"s before.

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Some statistics can be seen on the server status page (rows in the top tables with the term "LLR2"). /JeppeSN

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Eudy Silva

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Go to https://statsgr.id/team.php?challenge_id=2022_4&team_id=132 and click on [TA]Skillz (in order to hide his graph).
Then observe xii5ku's progression.
Massive contribution, since yesterday.
____________

"Accidit in puncto, quod non contingit in anno."
Something that does not occur in a year may, perchance, happen in a moment.

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Only 12 hours left in the challenge! Here are the stats so far:

Challenge: M.C. Escher's Birthday
App: 19 (SR5-LLR)
Fast DC tasks are NOT included.
(As of 2022-06-22 00:02:04 UTC)

144782 tasks have been sent out. [CPU/GPU/anonymous_platform: 143148 (99%) / 0 (0%) / 1634 (1%)]

Of those tasks that have been sent out:

10314 (7%) were aborted. [10314 (7%) / 0 (0%) / 0 (0%)]
1204 (1%) came back with some kind of an error. [1204 (1%) / 0 (0%) / 0 (0%)]
91068 (63%) have returned a successful result. [89490 (62%) / 0 (0%) / 1578 (1%)]
42198 (29%) are still in progress. [42142 (29%) / 0 (0%) / 56 (0%)]

Of the tasks that have been returned successfully:

24826 (27%) are pending validation. [24579 (27%) / 0 (0%) / 247 (0%)]
66242 (73%) have been successfully validated. [64911 (71%) / 0 (0%) / 1331 (1%)]
4 (0%) were invalid. [4 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]

The current leading edge (i.e., latest work unit for which work has actually been sent out to a host) is n=4008337. The leading edge was at n=3794497 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 5.64% as much as it had prior to the challenge!
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Time flies like an arrow. Fruit flies like a banana.

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When it is LLR2 - I often download many tasks.
Which means I don't do as much double checking.
Which shows up as less tasks for the work done in the challenge stats.

I want my computers to have tasks to work on when the smoke signals between my computers and whatever is watching the smoke signals stops working.

It isn't unwarranted because my internet seems to find it's full capacity for unreliability during a challenge.

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We're done, folks! Delivering you the obligatory final stats (for now, until cleanup is done! it's beginning now, go getcha some of them delicious munchy crunchy cleanup tasks!)

Challenge: M.C. Escher's Birthday
App: 19 (SR5-LLR)
Fast DC tasks are NOT included.
(As of 2022-06-23 02:53:01 UTC)

159272 tasks have been sent out. [CPU/GPU/anonymous_platform: 157638 (99%) / 0 (0%) / 1634 (1%)]

Of those tasks that have been sent out:

20002 (13%) were aborted. [20002 (13%) / 0 (0%) / 0 (0%)]
1187 (1%) came back with some kind of an error. [1187 (1%) / 0 (0%) / 0 (0%)]
104333 (66%) have returned a successful result. [102755 (65%) / 0 (0%) / 1578 (1%)]
25218 (16%) are still in progress. [25162 (16%) / 0 (0%) / 56 (0%)]

Of the tasks that have been returned successfully:

22447 (22%) are pending validation. [22310 (21%) / 0 (0%) / 135 (0%)]
81886 (78%) have been successfully validated. [80445 (77%) / 0 (0%) / 1443 (1%)]
5 (0%) were invalid. [5 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]

The current leading edge (i.e., latest work unit for which work has actually been sent out to a host) is n=4022035. The leading edge was at n=3794497 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 6.00% as much as it had prior to the challenge!
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Based on my personal tracking of the leading edge for the project, here is how the leading edge advanced over the month of June

It looks like there was a false start just before the challenge, and then forward progress has temporarily stopped since the end of the challenge as those of us remaining on the project process aborted tasks and double checks that had accrued during the challenge.
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The false start might be due to people running some SR5 tasks in order to tune their systems in preparation for the challenge.
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"Accidit in puncto, quod non contingit in anno."
Something that does not occur in a year may, perchance, happen in a moment.

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Cleanup Status:

Jun 23: 14000 tasks outstanding; 9729 affecting individual (270) scoring positions; 8465 affecting team (62) scoring positions.
Jun 24: 4288 tasks outstanding; 1789 affecting individual (207) scoring positions; 1113 affecting team (37) scoring positions.
Jun 25: 1232 tasks outstanding; 263 affecting individual (99) scoring positions; 98 affecting team (8) scoring positions.
Jun 26: 930 tasks outstanding; 198 affecting individual (77) scoring positions; 9 affecting team (4) scoring positions.
Jun 27: 311 tasks outstanding; 41 affecting individual (30) scoring positions; 2 affecting team (1) scoring positions.
Jun 28: 95 tasks outstanding; 12 affecting individual (8) scoring positions; 0 affecting team (0) scoring positions.
Jun 29: 75 tasks outstanding; 8 affecting individual (7) scoring positions; 0 affecting team (0) scoring positions.
Jun 30: 13 tasks outstanding; 2 affecting individual (2) scoring positions; 0 affecting team (0) scoring positions.
Jul 1: 8 tasks outstanding; 2 affecting individual (2) scoring positions; 0 affecting team (0) scoring positions.
Jul 2: 7 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Jul 3: 6 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Jul 4: 5 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Jul 5: 4 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Jul 6: 3 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Jul 7: 3 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Jul 8: 3 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions
Jul 9: 3 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions
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I was going to wait until the leading edge began advancing again to make a post like this, but since I am going to be on vacation and without internet for the next week, I am just posting this information now and may update it later.

After the challenge, the leading edge stopped advancing while those of us still on the project started reprocessing the large number of aborted tasks/resends that challenges usually result in. This ends up making the leading edge advancement "during" the challenge of 6% much less impressive because a lot of that work is actually happening after the challenge. The line in red on the chart below is how the leading edge has advancement in time if you assume constant advancement each day during and after the challenge.

Since the statistic is that 66% of the tasks issued during the challenge returned a successful result, that means that the leading edge actually advanced up by 4% during the challenge, and 34% of the leading edge advancement that happened during the challenge is actually being taken care of all of us continuing to process after the challenge.
____________

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After the challenge, the leading edge stopped advancing while those of us still on the project started reprocessing the large number of aborted tasks/resends that challenges usually result in.

Your are right. It was 20000 extra tasks (aborts/resends) at the end of challenge. And they're not processed yet. Right now there are still 5100 extra tasks. Leading edge will advance again only when all of them will be sent.

A side effect of this is that cleanup is stuck at one pending task - it need to send main task due to error in certificate, and affected task is close to the leading edge. Task are selected from database as "oldest first", so it'll take few more days until system gets closer to the leading edge.

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After the challenge, the leading edge stopped advancing while those of us still on the project started reprocessing the large number of aborted tasks/resends that challenges usually result in.

Your are right. It was 20000 extra tasks (aborts/resends) at the end of challenge. And they're not processed yet. Right now there are still 5100 extra tasks. Leading edge will advance again only when all of them will be sent.

A side effect of this is that cleanup is stuck at one pending task - it need to send main task due to error in certificate, and affected task is close to the leading edge. Task are selected from database as "oldest first", so it'll take few more days until system gets closer to the leading edge.

Alas, that sounds like a small flaw in the assumption that cleanup will be a fixed amount of time regardless of the project used in challenges for LLR2 projects.
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