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Number crunching :
Katherine Johnson Memorial Challenge
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In wake of these cancellations, we've done some rebranding! Check the 2020 Challenge Schedule for updates!
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That page needs an update. It still reads Summer Olympics 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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 Michael Gutierrez Volunteer moderator
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Welcome to the Katherine Johnson Memorial Challenge
The fifth challenge of the 2020 Series will be a 7-day challenge celebrating the life of Katherine Johnson. The challenge will be offered on the TRP-LLR application, beginning 24 July 20:00 UTC and ending 31 July 20:00 UTC.
Katherine Johnson was one of the first African-American women to work as a NASA scientist. Her calculations on orbital mechanics proved vital to early crewed spaceflights. We highly recommend Hidden Figures: The American Dream and the Untold Story of the Black Women Who Helped Win the Space Race by Margot Lee Shetterly, and the accompanying movie. With all the chaos going on in the world, this uplifting story is a nice change of pace.
Being handpicked to be one of three black students to integrate West Virginia’s graduate schools is something that many people would consider one of their life’s most notable moments, but it’s just one of several breakthroughs that have marked Katherine Johnson’s long and remarkable life. When asked to name her greatest contribution to space exploration, Johnson would talk about the calculations that helped synch Project Apollo’s Lunar Module with the lunar-orbiting Command and Service Module. She also worked on the Space Shuttle and the Earth Resources Technology Satellite (ERTS, later renamed Landsat) and authored or coauthored 26 research reports. She retired in 1986, after 33 years at Langley. “I loved going to work every single day,” she said. In 2015, at age 97, Johnson added another extraordinary achievement to her long list: President Barack Obama awarded her the Presidential Medal of Freedom, America’s highest civilian honor.
She died on Feb. 24, 2020. NASA Administrator James Bridenstine said, "Our NASA family is sad to learn the news that Katherine Johnson passed away this morning at 101 years old. She was an American hero and her pioneering legacy will never be forgotten." (Words Credit: NASA)
To participate in the Challenge, please select only the The Riesel Problem LLR (TRP) project in your PrimeGrid preferences section.
Application builds are available for Linux 32 and 64 bit, Windows 32 and 64 bit and MacIntel. Intel and Zen2-based AMD CPUs with FMA3 capabilities (Haswell, Broadwell, Skylake, Kaby Lake, Coffee Lake, and Ryzen 3rd gen) 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.
ATTENTION: The primality program LLR is CPU intensive; so, it is vital to have a stable system with good cooling. It does not tolerate "even the slightest of errors." Please see this post for more details on how you can "stress test" your computer. Tasks on one CPU core will take about 21 hours on fast/newer computers and 3 days+ on slower/older computers. If your computer is highly overclocked, please consider "stress testing" it. Sieving is an excellent alternative for computers that are not able to LLR. :)
Highly overclocked Haswell, Broadwell, Skylake, Kaby Lake or Coffee Lake (i.e., Intel Core i7, i5, and i3 -4xxx or better) computers running the application will see fastest times. Note that SGS 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. 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.
Please, please, please make sure your machines are up to the task.
Multi-threading is supported and IS recommended.
Those looking to maximise 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 an Intel CPU with hyperthreading, either turn off the hyperthreading 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 24th July 2020 20:00 UTC and received BEFORE 31st July 2020 20:00 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 an LLR 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. :)
About the Riesel Problem
In 1956, Hans Riesel showed that there are an infinite number of positive odd integer k's such that k*2^n-1 is composite (not prime) for every integer n>=1. These numbers are now called Riesel numbers. He further showed that k=509203 was such one.
It is conjectured that 509203 is the smallest Riesel number. The Riesel problem consists of determining that 509203 is the smallest Riesel number. To show that it is the smallest, a prime of the form k*2^n-1 must be found for each of the positive integer k's less than 509203. As of December 13th, 2017, there remain 49 k's for which no primes have been found. They are as follows:
2293, 9221, 23669, 31859, 38473, 46663, 67117, 74699, 81041, 93839, 97139, 107347, 121889, 129007, 143047, 146561, 161669, 192971, 206039, 206231, 215443, 226153, 234343, 245561, 250027, 315929, 319511, 324011, 325123, 327671, 336839, 342847, 344759, 362609, 363343, 364903, 365159, 368411, 371893, 384539, 386801, 397027, 409753, 444637, 470173, 474491, 477583, 485557, 494743
For a more detailed history and status of the Riesel problem, please visit Wilfrid Keller's The Riesel Problem: Definition and Status.
The Riesel problem is to k*2^n-1 as the Sierpinski problem is to k*2^n+1. There is no equivalent to the 'prime' Sierpinski problem since k=509203, the conjectured smallest Riesel number, is prime.
Last Primes found at PrimeGrid
402539*2^7173024-1 by Walter Darimont on 2 October 2014. Official Announcement.
502573*2^7181987-1 by Denis Iakovlev on 4 October 2014. Official Announcement.
273809*2^8932416-1 by Wolfgang Schwieger on 13 December 2017. Official Announcement.
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:
(Edouard Lucas: 1842-1891, Derrick H. Lehmer: 1905-1991, Hans Riesel: 1929-2014).
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Time flies like an arrow. Fruit flies like a banana.
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Also make sure to read Hidden Figures, a book about Katherine Johnson and some of her contemporaries, for the book club meeting!
Hmmmm
A book club meeting? I'd love to come! (I'm reading lots of books in my summer vacation since--no homework!)
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My lucky number is 6219*2^3374198+1
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I'll be interested to see if things change when this challenge starts. My poor, old 1950X is getting flogged in the 1st's category. 13% 1st rate so far and that's running 3 wu/s across 16 cores.
Theoretically I'd expect people to go for throughput over 1st rate during the comp.
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Слава Україні! | |
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Looking in my crystal ball. Will a new k be eliminated during the challenge? Last time it happened was in December 2017. /JeppeSN | |
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Michael GoetzVolunteer moderator
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REMINDER: If you have any Windows 10 computers that are going to participate in this challenge, now would be a good time to set those computers to pause Windows Updates until after the challenge ends.
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My lucky number is 75898524288+1 | |
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MonkeydeeVolunteer tester
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A bold prediction: A large or special prime will be found during this challenge. However, it will not be a TRP prime.
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My Primes
Badge Score: 4*2 + 6*2 + 7*4 + 8*8 + 11*3 + 12*1 = 157
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robishVolunteer moderator
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A bold prediction: A large or special prime will be found during this challenge. However, it will not be a TRP prime.
+1, but maybe a TRP too :)
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My lucky numbers 10590941048576+1 and 224584605939537911+81292139*23#*n for n=0..26 | |
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A bold prediction: A large or special prime will be found during this challenge. However, it will not be a TRP prime.
Luring me to run CUL on purpose to eliminate competitors? ;) (jkjk)
+2, but a TRP is possible too.
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My lucky number is 6219*2^3374198+1
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BurVolunteer tester
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A bold prediction: A large or special prime will be found during this challenge. However, it will not be a TRP prime. Please elaborate... :)
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MonkeydeeVolunteer tester
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A bold prediction: A large or special prime will be found during this challenge. However, it will not be a TRP prime. Please elaborate... :)
It's a bit of a running joke here where during challenges we have found large primes that are not related to the challenge. For example we might find a GFN18 or GFN19 prime during a PSP challenge.
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My Primes
Badge Score: 4*2 + 6*2 + 7*4 + 8*8 + 11*3 + 12*1 = 157
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It was explained on Discord that the longest TRP tasks are about 60% longer than the shortest ones. Because the k size influences the FFT size (fast Fourier transform). /JeppeSN | |
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Michael GutierrezVolunteer moderator
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About 8 hours in, we're knocking it out of the park!
Challenge: Katherine Johnson Memorial
App: 15 (TRP-LLR)
(As of 2020-07-25 04:41:23 UTC)
15533 tasks have been sent out. [CPU/GPU/anonymous_platform: 15533 (100%) / 0 (0%) / 0 (0%)]
Of those tasks that have been sent out:
1426 (9%) were aborted. [1426 (9%) / 0 (0%) / 0 (0%)]
266 (2%) came back with some kind of an error. [266 (2%) / 0 (0%) / 0 (0%)]
2823 (18%) have returned a successful result. [2823 (18%) / 0 (0%) / 0 (0%)]
11018 (71%) are still in progress. [11018 (71%) / 0 (0%) / 0 (0%)]
Of the tasks that have been returned successfully:
2093 (74%) are pending validation. [2093 (74%) / 0 (0%) / 0 (0%)]
729 (26%) have been successfully validated. [729 (26%) / 0 (0%) / 0 (0%)]
1 (0%) were invalid. [1 (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=10381840. The leading edge was at n=10327620 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 0.52% 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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About 8 hours in, we're knocking it out of the park!
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1 (0%) were invalid. [1 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]
Who had the invalid task? Not me I hope!
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My lucky number is 6219*2^3374198+1
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Michael GoetzVolunteer moderator
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About 8 hours in, we're knocking it out of the park!
...
1 (0%) were invalid. [1 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]
Who had the invalid task? Not me I hope!
There's a LOT of failed tasks that stopped after a few seconds but for some reason were reported as "successfully completed". They won't pass validation, of course, so they'll show up, eventually, in the invalid column.
Normally, with a wrong result, a second task comes in, and both are marked inconclusive until a third task matches one of the first two. Bad tasks like these, however, are immediately marked as invalid as soon as the validator sees them because there's no result at all.
I'm sure you would have noticed if your tasks were finishing in 5 seconds, so you can be pretty confident this wasn't you. Besides, you don't need me to tell you if you have any tasks marked invalid. You can see for yourself in your task list.
Note: The leaderboard software is pretty good at filtering out obviously bad results like these, so don't worry too much about bad results (or bad actors) temporarily getting an unwarranted high position in the standings.
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My lucky number is 75898524288+1 | |
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About 8 hours in, we're knocking it out of the park!
...
1 (0%) were invalid. [1 (0%) / 0 (0%) / 0 (0%)]
0 (0%) are inconclusive. [0 (0%) / 0 (0%) / 0 (0%)]
Who had the invalid task? Not me I hope!
There's a LOT of failed tasks that stopped after a few seconds but for some reason were reported as "successfully completed". They won't pass validation, of course, so they'll show up, eventually, in the invalid column.
Normally, with a wrong result, a second task comes in, and both are marked inconclusive until a third task matches one of the first two. Bad tasks like these, however, are immediately marked as invalid as soon as the validator sees them because there's no result at all.
I'm sure you would have noticed if your tasks were finishing in 5 seconds, so you can be pretty confident this wasn't you. Besides, you don't need me to tell you if you have any tasks marked invalid. You can see for yourself in your task list.
Note: The leaderboard software is pretty good at filtering out obviously bad results like these, so don't worry too much about bad results (or bad actors) temporarily getting an unwarranted high position in the standings.
K, thanks!
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My lucky number is 6219*2^3374198+1
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About 8 hours in, we're knocking it out of the park!
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15533 tasks have been sent out....
How many tasks are normally sent out ?
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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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How many tasks are normally sent out ?
You can see LLR Tasks per Day on https://www.primegrid.com/server_status_tasks.php. /JeppeSN
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42 | |
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Michael GutierrezVolunteer moderator
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About a day into the challenge, here's the progress!
Challenge: Katherine Johnson Memorial
App: 15 (TRP-LLR)
(As of 2020-07-26 02:23:59 UTC)
29493 tasks have been sent out. [CPU/GPU/anonymous_platform: 29493 (100%) / 0 (0%) / 0 (0%)]
Of those tasks that have been sent out:
2010 (7%) were aborted. [2010 (7%) / 0 (0%) / 0 (0%)]
510 (2%) came back with some kind of an error. [510 (2%) / 0 (0%) / 0 (0%)]
15036 (51%) have returned a successful result. [15036 (51%) / 0 (0%) / 0 (0%)]
11937 (40%) are still in progress. [11937 (40%) / 0 (0%) / 0 (0%)]
Of the tasks that have been returned successfully:
5480 (36%) are pending validation. [5480 (36%) / 0 (0%) / 0 (0%)]
9531 (63%) have been successfully validated. [9531 (63%) / 0 (0%) / 0 (0%)]
12 (0%) were invalid. [12 (0%) / 0 (0%) / 0 (0%)]
13 (0%) are inconclusive. [13 (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=10432437. The leading edge was at n=10327620 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 1.01% 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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Michael GoetzVolunteer moderator
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About 8 hours in, we're knocking it out of the park!
...
15533 tasks have been sent out....
How many tasks are normally sent out ?
The better number actually comes from the monthly chart, which isn't shown unless you know where to look for it. That goes far enough back to see the steady state for TRP before people started running it more in the run up to the challenge.
We were doing two hundred to three hundred tasks per day before people started moving to TRP for the challenge. Right now, we're doing thirteen thousand tasks per day.
Kind of ridiculous, isn't it?
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My lucky number is 75898524288+1 | |
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BurVolunteer tester
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Makes you think if focusing on fewer subprojects would be better. | |
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Makes you think if focusing on fewer subprojects would be better.
Of course it would, so let's get all these conjectures solved!
And then turn more prime problems into new subprojects. :)
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Eating more cheese on Thursdays. | |
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We were doing two hundred to three hundred tasks per day before people started moving to TRP for the challenge. Right now, we're doing thirteen thousand tasks per day.
Kind of ridiculous, isn't it?
Impressive !
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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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We were doing two hundred to three hundred tasks per day before people started moving to TRP for the challenge. Right now, we're doing thirteen thousand tasks per day.
That's the idea behind a challenge isn't it? To focus our combined efforts for a set period of time.
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We were doing two hundred to three hundred tasks per day before people started moving to TRP for the challenge. Right now, we're doing thirteen thousand tasks per day.
That's the idea behind a challenge isn't it? To focus our combined efforts for a set period of time.
Agreed.
Makes you think if focusing on fewer subprojects would be better.
The current selection on projects allows people to choose what they like and gather sets of badges. I think it's quite good this way.
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My lucky number is 6219*2^3374198+1
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Michael GutierrezVolunteer moderator
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Two days down!
Challenge: Katherine Johnson Memorial
App: 15 (TRP-LLR)
(As of 2020-07-27 04:38:28 UTC)
45136 tasks have been sent out. [CPU/GPU/anonymous_platform: 45136 (100%) / 0 (0%) / 0 (0%)]
Of those tasks that have been sent out:
2250 (5%) were aborted. [2250 (5%) / 0 (0%) / 0 (0%)]
756 (2%) came back with some kind of an error. [756 (2%) / 0 (0%) / 0 (0%)]
29774 (66%) have returned a successful result. [29774 (66%) / 0 (0%) / 0 (0%)]
12356 (27%) are still in progress. [12356 (27%) / 0 (0%) / 0 (0%)]
Of the tasks that have been returned successfully:
7177 (24%) are pending validation. [7177 (24%) / 0 (0%) / 0 (0%)]
22539 (76%) have been successfully validated. [22539 (76%) / 0 (0%) / 0 (0%)]
37 (0%) were invalid. [37 (0%) / 0 (0%) / 0 (0%)]
21 (0%) are inconclusive. [21 (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=10491654. The leading edge was at n=10327620 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 1.59% 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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Makes you think if focusing on fewer subprojects would be better.
Of course it would, so let's get all these conjectures solved!
And then turn more prime problems into new subprojects. :)
I can invent new conjectures faster than anyone can solve them. /JeppeSN | |
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BurVolunteer tester
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The current selection on projects allows people to choose what they like and gather sets of badges. I think it's quite good this way. You're right, it's more fun, but SoB and others like CUL are already progressing so slow.
But it's not like I'm making major computation power donations, so I'm not the one to say things like this. :D | |
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Makes you think if focusing on fewer subprojects would be better.
Of course it would, so let's get all these conjectures solved!
And then turn more prime problems into new subprojects. :)
I can invent new conjectures faster than anyone can solve them. /JeppeSN
Hahahaha good one!
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My lucky number is 6219*2^3374198+1
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"Hidden Figures" is a top book! I bought the Audible version (11 pounds) using my monthly subscription credit, so it ended up only costing me 6 pounds. Well worth it. :-)
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Michael GoetzVolunteer moderator
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"Hidden Figures" is a top book! I bought the Audible version (11 pounds) using my monthly subscription credit, so it ended up only costing me 6 pounds. Well worth it. :-)
It is truly an excellent book! I read it a few weeks ago.
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My lucky number is 75898524288+1 | |
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"Hidden Figures" is a top book! I bought the Audible version (11 pounds) using my monthly subscription credit, so it ended up only costing me 6 pounds. Well worth it. :-)
It is truly an excellent book! I read it a few weeks ago.
Yes! Read it for my project on NASA back in seventh grade.
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My lucky number is 6219*2^3374198+1
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Michael GutierrezVolunteer moderator
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Day 3 is coming to a close, here are the results!
Challenge: Katherine Johnson Memorial
App: 15 (TRP-LLR)
(As of 2020-07-28 02:47:31 UTC)
59022 tasks have been sent out. [CPU/GPU/anonymous_platform: 59022 (100%) / 0 (0%) / 0 (0%)]
Of those tasks that have been sent out:
3270 (6%) were aborted. [3270 (6%) / 0 (0%) / 0 (0%)]
1049 (2%) came back with some kind of an error. [1049 (2%) / 0 (0%) / 0 (0%)]
42154 (71%) have returned a successful result. [42154 (71%) / 0 (0%) / 0 (0%)]
12549 (21%) are still in progress. [12549 (21%) / 0 (0%) / 0 (0%)]
Of the tasks that have been returned successfully:
7753 (18%) are pending validation. [7753 (18%) / 0 (0%) / 0 (0%)]
34285 (81%) have been successfully validated. [34285 (81%) / 0 (0%) / 0 (0%)]
66 (0%) were invalid. [66 (0%) / 0 (0%) / 0 (0%)]
50 (0%) are inconclusive. [50 (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=10539410. The leading edge was at n=10327620 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 2.05% 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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Michael GutierrezVolunteer moderator
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Day 4 stats:
App: 15 (TRP-LLR)
(As of 2020-07-29 03:04:26 UTC)
74071 tasks have been sent out. [CPU/GPU/anonymous_platform: 74071 (100%) / 0 (0%) / 0 (0%)]
Of those tasks that have been sent out:
3678 (5%) were aborted. [3678 (5%) / 0 (0%) / 0 (0%)]
1383 (2%) came back with some kind of an error. [1383 (2%) / 0 (0%) / 0 (0%)]
55895 (75%) have returned a successful result. [55895 (75%) / 0 (0%) / 0 (0%)]
13115 (18%) are still in progress. [13115 (18%) / 0 (0%) / 0 (0%)]
Of the tasks that have been returned successfully:
8314 (15%) are pending validation. [8314 (15%) / 0 (0%) / 0 (0%)]
47449 (85%) have been successfully validated. [47449 (85%) / 0 (0%) / 0 (0%)]
107 (0%) were invalid. [107 (0%) / 0 (0%) / 0 (0%)]
25 (0%) are inconclusive. [25 (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=10594788. The leading edge was at n=10327620 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 2.59% 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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On the below graph from the task status page, you can see how TRP crawls up, due to the challenge, to be the 2nd highest frequency of completed tasks (only the tiny SGS tasks are more numerous) in LLR. Just before the challenge, some people run small tasks, SGS or PPSE, so they have a peak near the start of the challenge.
/JeppeSN | |
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Michael GutierrezVolunteer moderator
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Less than two days left!
Challenge: Katherine Johnson Memorial
App: 15 (TRP-LLR)
(As of 2020-07-30 02:42:41 UTC)
89185 tasks have been sent out. [CPU/GPU/anonymous_platform: 89185 (100%) / 0 (0%) / 0 (0%)]
Of those tasks that have been sent out:
3961 (4%) were aborted. [3961 (4%) / 0 (0%) / 0 (0%)]
1701 (2%) came back with some kind of an error. [1701 (2%) / 0 (0%) / 0 (0%)]
69360 (78%) have returned a successful result. [69360 (78%) / 0 (0%) / 0 (0%)]
14163 (16%) are still in progress. [14163 (16%) / 0 (0%) / 0 (0%)]
Of the tasks that have been returned successfully:
9065 (13%) are pending validation. [9065 (13%) / 0 (0%) / 0 (0%)]
60125 (87%) have been successfully validated. [60125 (87%) / 0 (0%) / 0 (0%)]
135 (0%) were invalid. [135 (0%) / 0 (0%) / 0 (0%)]
35 (0%) are inconclusive. [35 (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=10651660. The leading edge was at n=10327620 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 3.14% as much as it had prior to the challenge!
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Dave
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Any way of seeing what the FFT distribution is at this time? Would it be heavily skewed towards the high end or more of a classic Poisson? | |
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Dave wrote: Any way of seeing what the FFT distribution is at this time? Would it be heavily skewed towards the high end or more of a classic Poisson?
Here are two samples of 104 tasks each.
Sunday noon:
3 % 768K, 1 % 864K, 9 % 896K, 15 % 960K, 32 % 1M, 40 % zero padded 1120K
Thursday night:
2 % 768K, 0 % 864K, 3 % 896K, 13 % 960K, 32 % 1M, 12 % zero padded 1120K, 38 % 1120K
This is from hosts which run FMA3 FFT. Hosts which employ other implementations will use differently sized FFT lengths for the same workunits.
You can also look up the current k's and n's at stats_trp_llr.php and check their FFT lengths this way:
llr.exe -d -q"${k}*2^${n}-1" | |
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Michael GutierrezVolunteer moderator
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Only a few hours left! 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!
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Time flies like an arrow. Fruit flies like a banana. | |
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I was also curious about the FFT distribution and how it changes with increasing n for The Riesel Problem. While it is a bit late to be of any use for the challenge, I made the attached chart just to see. This is all FMA3 on a Ryzen 5 1600X, and will differ by instruction set, but the same general pattern should be observed across all CPUs. "Zero-padded" is abbreviated as "0-". Apologies to any fellow color-blind people too. I left the numbers in so that this still makes sense to us ;)
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Michael GutierrezVolunteer moderator
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We're done! Looks like we got unlucky in terms of primes, but still an incredible effort.
Cleanup starts now, expected to take about 3-4 weeks.
Challenge: Katherine Johnson Memorial
App: 15 (TRP-LLR)
(As of 2020-07-31 22:00:06 UTC)
117791 tasks have been sent out. [CPU/GPU/anonymous_platform: 117791 (100%) / 0 (0%) / 0 (0%)]
Of those tasks that have been sent out:
9653 (8%) were aborted. [9653 (8%) / 0 (0%) / 0 (0%)]
2510 (2%) came back with some kind of an error. [2510 (2%) / 0 (0%) / 0 (0%)]
93374 (79%) have returned a successful result. [93374 (79%) / 0 (0%) / 0 (0%)]
10861 (9%) are still in progress. [10861 (9%) / 0 (0%) / 0 (0%)]
Of the tasks that have been returned successfully:
8519 (9%) are pending validation. [8519 (9%) / 0 (0%) / 0 (0%)]
84604 (91%) have been successfully validated. [84604 (91%) / 0 (0%) / 0 (0%)]
203 (0%) were invalid. [203 (0%) / 0 (0%) / 0 (0%)]
48 (0%) are inconclusive. [48 (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=10739127. The leading edge was at n=10327620 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 3.98% 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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Well done you frozen crunchers!, congrats on your win!
Cheers Rick | |
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Oh great chilly ones, ;)
"Coolest team on Primegrid" :)
Congrats!
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My lucky numbers 10590941048576+1 and 224584605939537911+81292139*23#*n for n=0..26 | |
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Kellen that chart is BEAUTIFUL. When numbers reveal beauty. Imagine an animation of it shifting over time. | |
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Michael GutierrezVolunteer moderator
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Cleanup Status:
Aug 1: 7646 tasks outstanding; 4319 affecting individual (266) scoring positions; 2704 affecting team (37) scoring positions.
Aug 2: 5592 tasks outstanding; 3059 affecting individual (247) scoring positions; 1977 affecting team (31) scoring positions.
Aug 3: 4805 tasks outstanding; 2496 affecting individual (235) scoring positions; 1554 affecting team (27) scoring positions.
Aug 4: 3972 tasks outstanding; 1790 affecting individual (213) scoring positions; 858 affecting team (25) scoring positions.
Aug 5: 3737 tasks outstanding; 1641 affecting individual (204) scoring positions; 824 affecting team (25) scoring positions.
Aug 6: 1245 affecting individual (185) scoring positions; 593 affecting team (23) scoring positions.
Aug 7: 826 affecting individual (156) scoring positions; 428 affecting team (20) scoring positions.
Aug 8: 1252 tasks outstanding; 334 affecting individual (99) scoring positions; 173 affecting team (10) scoring positions.
Aug 9: 1003 tasks outstanding; 243 affecting individual (82) scoring positions; 23 affecting team (6) scoring positions.
Aug 10: 807 tasks outstanding; 181 affecting individual (67) scoring positions; 21 affecting team (6) scoring positions.
Aug 11: 701 tasks outstanding; 140 affecting individual (57) scoring positions; 17 affecting team (5) scoring positions.
Aug 12: 616 tasks outstanding; 114 affecting individual (49) scoring positions; 15 affecting team (5) scoring positions.
Aug 13: 233 tasks outstanding; 46 affecting individual (26) scoring positions; 4 affecting team (1) scoring positions.
Aug 14: 233 tasks outstanding; 46 affecting individual (26) scoring positions; 4 affecting team (1) scoring positions.
Aug 15: 211 tasks outstanding; 41 affecting individual (24) scoring positions; 4 affecting team (1) scoring positions.
Aug 16: 190 tasks outstanding; 36 affecting individual (23) scoring positions; 4 affecting team (1) scoring positions.
Aug 17: 159 tasks outstanding; 22 affecting individual (16) scoring positions; 2 affecting team (1) scoring positions.
Aug 18: 124 tasks outstanding; 16 affecting individual (13) scoring positions; 2 affecting team (1) scoring positions.
Aug 19: 101 tasks outstanding; 14 affecting individual (12) scoring positions; 2 affecting team (1) scoring positions.
Aug 20: 90 tasks outstanding; 13 affecting individual (11) scoring positions; 2 affecting team (1) scoring positions.
Aug 21: 75 tasks outstanding; 11 affecting individual (10) scoring positions; 2 affecting team (1) scoring positions.
Aug 22: 62 tasks outstanding; 9 affecting individual (9) scoring positions; 1 affecting team (1) scoring positions.
Aug 23: 58 tasks outstanding; 9 affecting individual (9) scoring positions; 1 affecting team (1) scoring positions.
Aug 24: 52 tasks outstanding; 8 affecting individual (8) scoring positions; 1 affecting team (1) scoring positions.
Aug 25: 47 tasks outstanding; 6 affecting individual (6) scoring positions; 1 affecting team (1) scoring positions.
Aug 26: 45 tasks outstanding; 6 affecting individual (6) scoring positions; 1 affecting team (1) scoring positions.
Aug 27: 33 tasks outstanding; 5 affecting individual (5) scoring positions; 0 affecting team (0) scoring positions.
Aug 28: 33 tasks outstanding; 5 affecting individual (5) scoring positions; 0 affecting team (0) scoring positions.
Aug 29: 30 tasks outstanding; 5 affecting individual (5) scoring positions; 0 affecting team (0) scoring positions.
Aug 30: 25 tasks outstanding; 5 affecting individual (5) scoring positions; 0 affecting team (0) scoring positions.
Aug 31: 16 tasks outstanding; 2 affecting individual (2) scoring positions; 0 affecting team (0) scoring positions.
Sep 1: 15 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Sep 2: 8 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Sep 3: 8 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Sep 4: 7 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
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Michael GutierrezVolunteer moderator
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The results are final!
It's a bit anticlimactic -- we were waiting on a single remaining cleanup task for about a week there, but it's finally final! We completed an incredible amount of work. In just 7 days, we completed almost 100,000 tasks. That's close to 10 times TRP's average LLR output. Congrats to everyone, this is a great accomplishment!
Unfortunately, no primes were found, but all the work done during the challenge has gotten us that much closer -- we advanced the leading edge by nearly 4%!
109 teams and 545 individuals participated in the Challenge.
Top Three Individuals:
1. tng
2. Pavel Atnashev
3. Scott Brown
Top Three Teams:
1. Antarctic Crunchers
2. Czech National Team
3. Aggie The Pew
The next Challenge is currently in progress. We hope to see you there! Thank you again to everyone. We appreciate your participation and hope you had fun!
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Time flies like an arrow. Fruit flies like a banana. | |
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Overall results updated accordingly.
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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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Message boards :
Number crunching :
Katherine Johnson Memorial Challenge |
