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 Michael Gutierrez Volunteer moderator
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Welcome to Yuri's Night Challenge
The third challenge of the 2021 Series will be a 3-day challenge celebrating the 60th anniversary of Yuri Gagarin's history-making venture into outer space. The challenge will be offered on the WW application, beginning 11 April 18:00 UTC and ending 14 April 18:00 UTC.
Yuri’s Night is a global celebration of humanity’s past, present, and future in space. Yuri’s Night parties and events are held around the world every April in commemoration of Yuri Gagarin becoming the first human to venture into space on April 12, 1961, and the inaugural launch of the first Space Shuttle on April 12, 1981.
Yuri’s Night events combine space-themed partying with education and outreach. These events can range from an all-night mix of techno and technology at a NASA Center, to a movie showing and stargazing at your local college, to a gathering of friends at a bar or barbecue.
In 2011, the 50th anniversary of human spaceflight, over 100,000 people attended 567 officially-recognized events in 75 countries on all 7 continents, while tens of thousands more watched the 12-hour live Yuri’s Night Global Webcast and participated online in the virtual world of Second Life.
For more info, or to watch this year's global livestream event, check out their website.
To participate in the Challenge, please select only the Wieferich and Wall-Sun-Sun Prime Search (WW) project in your PrimeGrid preferences section.
Application builds are available for Linux 64 bit, Windows 64 bit and MacIntel.
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 11th April 2021 18:00 UTC and received BEFORE 14th April 2021 18:00 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. :)
What is the Wieferich and Wall-Sun-Sun Prime Search?
A Wall–Sun–Sun (or Fibonacci–Wieferich) prime is a prime p > 5 in which p^2 divides the Fibonacci number  , where the Legendre symbol  is defined as 
They are named after Donald Dines Wall and twin brothers Zhi-Hong Sun and Zhi-Wei Sun. Drawing on Wall's work, in 1992 the brothers proved that if the first case of Fermat's last theorem was false for a certain prime p, then that p would have to be a Wall–Sun–Sun prime.
A prime p is a Wieferich prime if p^2 divides 2^(p-1) - 1. They are named after Arthur Wieferich who in 1909 proved that if the first case of Fermat’s last theorem is false for the exponent p, then p satisfies the criteria a^(p-1) = 1 (mod p^2) for a=2.
Notice the similarity in the expression p^2 divides 2^(p-1) - 1 to the special case of Fermat's little theorem p divides 2^(p-1) - 1.
For more info about the mathematics and the ranges we're searching, see these forum threads:
https://www.primegrid.com/forum_thread.php?id=9436
WW by the Numbers
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Time flies like an arrow. Fruit flies like a banana.
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2021 is the 100th anniversary of the birth of D. D. Wall, so a nice year to find some Wall-Sun-Sun near-results (like Wall did at IBM at the same time as the Soviet space program was planning to launch a man into space). /JeppeSN |
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Dave
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There should be some recognition on 13th August. I'm going to do 100 extra units then. |
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Chooka
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Dare I say... I feel this is the worst, GPU subproject for Radeon cards lol.
Terrible.
GLHF
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Слава Україні! |
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how much work remains on this task. what are the approximate deadlines for the completion of the subproject? |
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ReggieVolunteer moderator
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how much work remains on this task. what are the approximate deadlines for the completion of the subproject?
It's extremely difficult to give a deadline, but I'll say that approximately 20% of WW work has been completed. |
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tngSend message
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how much work remains on this task. what are the approximate deadlines for the completion of the subproject?
Any time for completion are of course speculative, but we've completed about 20% of it, and it started in November. That would make completion 1.5-2 years from now.
Of course, the software could be rewritten to extend the range of the search, in which case all bets are off.
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Michael GoetzVolunteer moderator
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how much work remains on this task. what are the approximate deadlines for the completion of the subproject?
We're at 19.65 percent.
The leading edge is 3625129000000000000 and assuming the software isn't changed, it will stop working at 18446744073709551616.
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My lucky number is 75898524288+1 |
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thanks! |
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I've returned a number of units within the requirements for the challenge but I'm not showing up in the participant stats. Do I have to nominate myself or something? |
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tngSend message
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I've returned a number of units within the requirements for the challenge but I'm not showing up in the participant stats. Do I have to nominate myself or something?
Were they issued during the challenge as well as returned during the challenge? Only tasks issued and returned during the challenge count in the challenge stats.
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I've returned a number of units within the requirements for the challenge but I'm not showing up in the participant stats. Do I have to nominate myself or something?
Were they issued during the challenge as well as returned during the challenge? Only tasks issued and returned during the challenge count in the challenge stats.
https://www.primegrid.com/results.php?userid=28080
Yes. |
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I've returned a number of units within the requirements for the challenge but I'm not showing up in the participant stats. Do I have to nominate myself or something?
I can see your name there. At this moment, tied in 277th place with some other crunchers.
The info in the link is updated every 15 minutes.
That is the official place to see the challenge results.
But if you're referring to these stats, well, they're updated much, much less frequently (I do it manually, only a few times per day during a challenge and until its cleanup is over).
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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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I've returned a number of units within the requirements for the challenge but I'm not showing up in the participant stats. Do I have to nominate myself or something?
I can see your name there. At this moment, tied in 277th place with some other crunchers.
The info in the link is updated every 15 minutes.
That is the official place to see the challenge results.
But if you're referring to these stats, well, they're updated much, much less frequently (I do it manually, only a few times per day during a challenge and until its cleanup is over).
It's the first ones I was referring to. I wasn't on them at the time, it must have been the delay.
I don't expect to take a high position, don't get me wrong, I just wanted to know it was being counted. |
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It's the first ones I was referring to. I wasn't on them at the time, it must have been the delay.
I don't expect to take a high position, don't get me wrong, I just wanted to know it was being counted.
Don't worry, you're there all right.
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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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Nick
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I have a problem with my internet.
Not problem enough to write here.
Any ideas?
Edit: I have connected all computers with my phone - my computers now say 'no internet connection' but it works. When it was connected with my landline, my computers had 'internet connection', which seemed to work except for receiving from PG, which didn't. And yes I tried turning them off and on again, including landline.
2nd edit: I checked the NBN "An unplanned incident is affecting the network", "As a result, you may experience a partial or total loss of connectivity. Restoration is underway." |
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This is propably a stupid question but will there be special badges awarded for Yuri's Night Challange or will credits be counted towards WW?
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compositeVolunteer tester
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This is propably a stupid question but will there be special badges awarded for Yuri's Night Challange or will credits be counted towards WW?
Badges are not awarded for challenges. However all work you do earns credit for the subproject badges. |
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Michael GutierrezVolunteer moderator
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24 hours in, here are the stats:
Challenge: Yuri's Night
App: 33 (WW)
(As of 2021-04-12 13:49:17 UTC)
93038 tasks have been sent out. [CPU/GPU/anonymous_platform: 6535 (7%) / 86132 (93%) / 371 (0%)]
Of those tasks that have been sent out:
2921 (3%) were aborted. [2679 (3%) / 242 (0%) / 0 (0%)]
4574 (5%) came back with some kind of an error. [26 (0%) / 4548 (5%) / 0 (0%)]
75452 (81%) have returned a successful result. [302 (0%) / 74780 (80%) / 370 (0%)]
10092 (11%) are still in progress. [3528 (4%) / 6563 (7%) / 1 (0%)]
Of the tasks that have been returned successfully:
7849 (10%) are pending validation. [53 (0%) / 7743 (10%) / 53 (0%)]
67533 (90%) have been successfully validated. [249 (0%) / 66967 (89%) / 317 (0%)]
58 (0%) were invalid. [1 (0%) / 57 (0%) / 0 (0%)]
16 (0%) are inconclusive. [0 (0%) / 16 (0%) / 0 (0%)]
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Nick
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~20 hours in |
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Nick
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Landline internet has been down for 16 hours.
I actually want to use my phone for something other than home internet connection.
I thought I could download some tasks - say 0.5 day's worth.
For the CPU only computer - and boinc knows exactly how long these tasks run - I got 2 days worth.
For a GPU computer, where I have consistently returned results in 6 min, 15 sec - the initial time is 23 times this. So if I want to download half a day's worth, it will need to be 11.5 days. Except deadlines seem to be 7 days which translates as 0.3 of a day. I'm not going there. It looks like my phone will have to stay here. |
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Landline internet has been down for 16 hours.
I actually want to use my phone for something other than home internet connection.
In my location - the same problem. 8 hours without conection - also waiting position for Conection - now ok
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Should I be running this on CPU too? What's the optimal number of threads?
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My lucky number is 6219*2^3374198+1
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Should I be running this on CPU too? What's the optimal number of threads?
It is incredibly slow on CPU. Try using all your threads on one task. /JeppeSN |
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Should I be running this on CPU too? What's the optimal number of threads?
It is incredibly slow on CPU. Try using all your threads on one task. /JeppeSN
Hmmm 4t tasks use 16 hours projected, maybe I should use 8t after this one.
Does SMT affect this?
If not, I'm going to use 12 threads out of 16 total.
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My lucky number is 6219*2^3374198+1
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MonkeydeeVolunteer tester
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If you're throwing a CPU at this then, like JeppeSN mentioned, use every thread your CPU has.
I have 20 out of 24 threads on my Ryzen 3900X going and it's getting 15-16K second run times.
For comparison an i5-8400 running 5 out of 6 threads is getting 54-55K second run times.
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My Primes
Badge Score: 4*2 + 6*2 + 7*1 + 8*11 + 9*1 + 11*3 + 12*1 = 169
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If you're throwing a CPU at this then, like JeppeSN mentioned, use every thread your CPU has.
I have 20 out of 24 threads on my Ryzen 3900X going and it's getting 15-16K second run times.
For comparison an i5-8400 running 5 out of 6 threads is getting 54-55K second run times.
OK, thanks for the suggestions
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My lucky number is 6219*2^3374198+1
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Michael GoetzVolunteer moderator
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Should I be running this on CPU too?
Yes. It won't add a LOT of extra tasks, but every little bit counts.
What's the optimal number of threads?
All of them. Including hyperthreads. Seriously.
This is very slow on the CPU, and the challenge is only three days long, (and now there's really only one day left), so you need the tasks to finish as quickly as possible. I'm using three computers right now which are 8c/16t, 4c/4t, and 2c/4t, and I'm running WW on those CPUs at -t16, -t4, and -t4, respectively. The run times for those machines in that configuration are approximately 6 hours, 24 hours, and 72 hours. Yes, that last machine will barely complete one task. Maybe. it will be close.
EDIT: The three CPUs are AMD 3700X, Intel i5-4670K, and Intel i3-330M. No, I'm not bothering to reserve any threads for the GPU. WW hardly uses any CPU time, and keeping all threads crunching doesn't seem to impact the GPU speed, at least not on my 3700X/GTX 1060 combination.
EDIT2: As of right now, it looks like that last machine will finish its one and only task with about 40 minutes to spare. It started the task 7 seconds after the challenge started.
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Michael GutierrezVolunteer moderator
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Day 2 update:
Challenge: Yuri's Night
App: 33 (WW)
(As of 2021-04-13 13:52:53 UTC)
199366 tasks have been sent out. [CPU/GPU/anonymous_platform: 8186 (4%) / 190433 (96%) / 747 (0%)]
Of those tasks that have been sent out:
3288 (2%) were aborted. [2976 (1%) / 312 (0%) / 0 (0%)]
10970 (6%) came back with some kind of an error. [733 (0%) / 10237 (5%) / 0 (0%)]
172351 (86%) have returned a successful result. [1044 (1%) / 170561 (86%) / 746 (0%)]
12760 (6%) are still in progress. [3433 (2%) / 9326 (5%) / 1 (0%)]
Of the tasks that have been returned successfully:
10654 (6%) are pending validation. [79 (0%) / 10519 (6%) / 56 (0%)]
161499 (94%) have been successfully validated. [965 (1%) / 159844 (93%) / 690 (0%)]
174 (0%) were invalid. [1 (0%) / 173 (0%) / 0 (0%)]
35 (0%) are inconclusive. [0 (0%) / 35 (0%) / 0 (0%)]
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Time flies like an arrow. Fruit flies like a banana. |
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When I download a WW task, it show almost 6 hours expected duration initially. When it starts, this quickly starts dropping , and it typically finishes in about 27 minutes. Is there something wrong with the calculations of expected duration?
These are GPU tasks, run on a GTX 1080. |
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Dave
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Normal, especially if you haven't done many recently or also done some CPU tasks. I have initial estimates of a day or more when they take 25 mins. CPU going at the same time? As long as they're error free just let BOINC do its thing. |
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Nick
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The issue for me is that if I want a buffer of tasks - my internet connection has been dodgy - then I am limited by the initial estimated duration.
On 1 computer, GPU tasks are overestimated by 23 times.
On 2 computers, GPU tasks are overestimated by 70 times.
So 7 days - computer connecting once every 7 days (which I understand to be the maximum for this project as I tried 14 days and got a really impressive red warning which in hindsight I kind of wish said "You broke it!" because I think that would be funny) - which gives me 0.3 days (for 23x) and 0.1 day (for 70x)
As the estimation for CPU is more accurate, or underestimated (underestimated in duration being manifested by how many more tasks I receive than desired), it is slightly (only very slightly) more challenging to get not too much CPU tasks in the buffer while maxing the buffer of GPU tasks.
On 3 computers I am running both GPU and CPU tasks and I don't know if running both affects estimated run times. |
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Chooka
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44% 1st rate rate with a Radeon VII - Ouch!
It's not a fan of WW :)
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Слава Україні! |
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No worries, 21.43% on a GTX1650.
The Radeon VII, was, after all, the flagship.
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My lucky number is 6219*2^3374198+1
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mackerelVolunteer tester
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This project does seem to like the newer nvidia GPUs (Turing/Ampere). My 2070 is about 2x the throughput of 1080Ti, yet the 1080Ti is certainly faster in non-RTX gaming. Power efficiency of Turing is between 2x to 3x relative to Pascal. Similarly my 1650 is faster than a 1070, where the roles are reversed for gaming.
Never owned a Radeon VII. As a recycled "pro" card it has insane FP64 performance, but uses for that are somewhat limited. |
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Nick
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I hope this isn't too far off topic.
If possible and not too difficult to do, does anyone reckon treating CPU and GPU stats for the same sub-project in 'Tasks returned in last 24 hours' as 2 separate items? |
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Michael GutierrezVolunteer moderator
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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!
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Time flies like an arrow. Fruit flies like a banana. |
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I hope this isn't too far off topic.
If possible and not too difficult to do, does anyone reckon treating CPU and GPU stats for the same sub-project in 'Tasks returned in last 24 hours' as 2 separate items?
Hi Yes I think it would make tracking tasks easier.
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Michael GutierrezVolunteer moderator
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And we're done! Final stats below; cleanup is starting soon.
Challenge: Yuri's Night
App: 33 (WW)
(As of 2021-04-14 18:39:12 UTC)
320139 tasks have been sent out. [CPU/GPU/anonymous_platform: 9086 (3%) / 309868 (97%) / 1185 (0%)]
Of those tasks that have been sent out:
3766 (1%) were aborted. [3271 (1%) / 495 (0%) / 0 (0%)]
16796 (5%) came back with some kind of an error. [736 (0%) / 16060 (5%) / 0 (0%)]
285939 (89%) have returned a successful result. [2029 (1%) / 282726 (88%) / 1184 (0%)]
12541 (4%) are still in progress. [2949 (1%) / 9592 (3%) / 0 (0%)]
Of the tasks that have been returned successfully:
11841 (4%) are pending validation. [80 (0%) / 11713 (4%) / 48 (0%)]
273765 (96%) have been successfully validated. [1949 (1%) / 270680 (95%) / 1136 (0%)]
319 (0%) were invalid. [1 (0%) / 318 (0%) / 0 (0%)]
35 (0%) are inconclusive. [0 (0%) / 35 (0%) / 0 (0%)]
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Time flies like an arrow. Fruit flies like a banana. |
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Chooka
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Thanks for organising this focus on WW.
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Слава Україні! |
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Only 26 Tasks are Wworks, ( 1 hour and all Tasks are ready )
I have it with RTX 3070 in work
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Great job everyone!!
Sadly I ended 306th but this wasn't the worst of my situations-
btw How much in is WW currently? How much of a dent was this challenge able to make?
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My lucky number is 6219*2^3374198+1
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Michael GoetzVolunteer moderator
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btw How much in is WW currently? How much of a dent was this challenge able to make?
The leading edge is now at 22.33%. It was at 19.65% at the start of the challenge.
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My lucky number is 75898524288+1 |
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Michael GutierrezVolunteer moderator
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Cleanup Status:
Apr 14: 10601 tasks outstanding; 4606 affecting individual (252) scoring positions; 1682 affecting team (30) scoring positions.
Apr 15: 6297 tasks outstanding; 2193 affecting individual (219) scoring positions; 641 affecting team (18) scoring positions.
Apr 16: 4408 tasks outstanding; 1362 affecting individual (186) scoring positions; 351 affecting team (10) scoring positions.
Apr 17: 3799 tasks outstanding; 1104 affecting individual (175) scoring positions; 229 affecting team (8) scoring positions.
Apr 18: 3533 tasks outstanding; 986 affecting individual (168) scoring positions; 219 affecting team (8) scoring positions.
Apr 19: 2926 tasks outstanding; 733 affecting individual (146) scoring positions; 187 affecting team (6) scoring positions.
Apr 20: 1570 tasks outstanding; 307 affecting individual (86) scoring positions; 14 affecting team (2) scoring positions.
Apr 21: 893 tasks outstanding; 132 affecting individual (55) scoring positions; 4 affecting team (1) scoring positions.
Apr 22: 245 tasks outstanding; 38 affecting individual (24) scoring positions; 1 affecting team (1) scoring positions.
Apr 23: 41 tasks outstanding; 5 affecting individual (5) scoring positions; 1 affecting team (1) scoring positions.
Apr 24: 34 tasks outstanding; 3 affecting individual (3) scoring positions; 1 affecting team (1) scoring positions.
Apr 25: 2 affecting individual (2) scoring positions; 1 affecting team (1) scoring positions.
Apr 26: 21 tasks outstanding; 2 affecting individual (2) scoring positions; 1 affecting team (1) scoring positions.
Apr 27: 8 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Apr 28: 7 tasks outstanding; 1 affecting individual (1) scoring positions; 0 affecting team (0) scoring positions.
Apr 29: 4 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!
During these 3 short days, we completed more than 258 thousand tasks. We found 7 new Wall-Sun-Sun instances, as well as 3 Wieferich instances, and our overall output was still more than 5 times WW's average -- or about 4 challenge-time Gelly's!
104 teams and 453 individuals participated in the Challenge.
Top Three Individuals:
1. Gelly
2. tng
3. Azmodes
Top Three Teams:
1. Antarctic Crunchers
2. SETI.Germany
3. Czech National Team
The next Challenge is PrimeGrid's 16th Birthday Challenge, which starts June 12. 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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The results are final!
Nice. Thank you for your work !
Current Overall Standings in PrimeGrid's Challenge Series 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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104 teams and 453 individuals participated in the Challenge.
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A small note/correction:
109 teams participated in the challenge and they were spread over 104 different scoring positions (some teams had tied scores and shared the same rank in the challenge);
481 individuals participated in the challenge and they were spread over 453 different scoring positions (many individuals had tied scores and shared the same rank in the challenge).
____________
"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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104 teams and 453 individuals participated in the Challenge.
...
A small note/correction:
109 teams participated in the challenge and they were spread over 104 different scoring positions (some teams had tied scores and shared the same rank in the challenge);
481 individuals participated in the challenge and they were spread over 453 different scoring positions (many individuals had tied scores and shared the same rank in the challenge).
Correct with 109 teams and 481 users.
When every task gives the same credit, it is not unusual that several users and teams are tied (with just one correct task) on the last position.
However, there were ties at other places as well, so it is not precise to say "spread over 104 [453] different scoring positions" either.
/JeppeSN |
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[quote][quote]
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so it is not precise to say "spread over 104 [453] different scoring positions" either.
/JeppeSN
Right.
Maybe I should've written "spread over some same scoring positions".
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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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