Welcome to the World Peace Day Challenge

The seventh challenge of the 2023 Series will be a 10-day challenge celebrating World Peace Day! The challenge will be offered on the SOB-LLR application, beginning 13 September 11:00 UTC and ending 23 September 11:00 UTC.

World Peace Day, also known as the International Day of Peace, is an annual United Nations holiday observed on September 21st. Established in 1981 by unanimous United Nations resolution 36/37, the General Assembly declared this as a day devoted to “commemorating and strengthening the ideals of peace both within and among all nations and peoples.” Furthering the Day’s mission, the General Assembly augmented the original resolution in 2001, fixing the date on 21 September. (Read more)

To participate in the challenge:

• Wait until the challenge timeframe starts (or set your BOINC Client download schedule accordingly), as tasks issued before the challenge will not count.
  
• In your PrimeGrid preferences section, select only the Seventeen or Bust (LLR) project.
  

Important reminders:

• NOTE: SOB tasks are very long.
  
• 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.
  
• The typical deadline for some of these WUs is longer than the challenge time-frame, so make sure your computer is able to return the WUs within 10 days. Only tasks issued AFTER the start time and returned BEFORE the finish time will be counted.
  
• 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 a Challenge. DETACHING, RESETTING, and PAUSING tasks causes them to remain in limbo until they EXPIRE. Therefore, we must wait until tasks expire to send them out to be completed. Please consider either completing what's in the queue or ABORTING them. Thanks!

Let's talk about hardware:

Supported platforms for LLR tasks:


• Windows: 32 bit, 64 bit
  
• Linux: 32 bit, 64 bit
  
• Mac: 64 bit
  
• Multi-threading is supported and IS recommended. Click here to set the maximum number of threads.
  
• Uses fast proof tasks so no double check tasks are needed. Everyone is "first"!


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 running LLR tasks, and CPUs with AVX-512 capabilities (certain recent Intel Skylake-X and Xeon CPUs, AMD Ryzen 7000 and EPYC 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, Xeon, or AMD Zen-4+ 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.

As with all number crunching, excessive heat can potentially cause permanent hardware failure. Please ensure your cooling system is sufficient. Please see this post for more details on how you can "stress test" your CPU.

Additional information:

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 13 September 11:00 UTC and received BEFORE 23 September 11:00 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.

About the Seventeen or Bust Search


Seventeen or Bust was a distributed computing project attempting to solve the Sierpinski problem. The name of the project is due to the fact that, when founded, there were seventeen values of k < 78,557 for which no primes were known.

The project was conceived in March of 2002 by two college undergraduates. After some planning and a lot of programming, the first public client was released on April 1. Seventeen or Bust ceased operations in 2016. The project was administered by:

• Louis Helm, a computer engineer in Austin, Texas.
  
• David Norris, a software engineer in Urbana, Illinois.
  
• Michael Garrison, a Computer Science undergraduate at Eastern Michigan University in Ypsilanti, Michigan.
  

Starting in 2010, PrimeGrid partnered with Seventeen or Bust to work towards solving the Sierpinski Problem. After the demise of the original Seventeen or Bust project in 2016, PrimeGrid is continuing by itself to continue the Seventeen or Bust project in looking to solve the Sierpinski Problem.

As of October of 2016, PrimeGrid and Seventeen or Bust have eliminated twelve of those seventeen candidates. The project might now be styled "Five or Bust," but the original name will be kept for consistency.

PrimeGrid and Seventeen or Bust's twelve prime discoveries are:

1. 46157*2^698207+1 with 210,186 decimal digits, discovered November 27, 2002. Crunched by Stephen Gibson.
   
2. 65567*2^1013803+1 with 305,190 decimal digits, discovered December 2, 2002. Crunched by James Burt.
   
3. 44131*2^995972+1 with 299,823 decimal digits, discovered December 5, 2002. Crunched by an anonymous participant.
   
4. 69109*2^1157446+1 with 348,431 decimal digits, discovered December 6, 2002. Crunched by Sean DiMichele.
   
5. 54767*2^1337287+1 with 402,569 decimal digits, discovered December 23, 2002. Crunched by Peter Coels.
   
6. 5359*2^5054502+1 with 1,521,561 decimal digits, discovered December 6, 2003. Crunched by Randy Sundquist.
   
7. 28433*2^7830457+1 with 2,357,207 decimal digits, discovered December 30, 2004. Crunched by a member of Team Prime Rib.
   
8. 27653*2^9167433+1 with 2,759,677 decimal digits, discovered June 8, 2005. Crunched by Derek Gordon.
   
9. 4847*2^3321063+1 with 999,744 decimal digits, discovered October 15, 2005 while double checking earlier tests. Crunched by Richard Hassler.
   
10. 19249*2^13018586+1 with 3,918,990 decimal digits, discoverd March 26, 2007. Crunched by Konstantin Agafonov.
    
11. 33661*2^7031232+1 with 2,116,617 decimal digits, discovered October 17, 2007 while double checking earlier tests. Crunched by Sturle Sunde.
    
12. 10223*2^31172165+1 with 9,383,761 decimal digits, discovered October 31, 2016. Crunched by Szabolcs Péter (SyP). This prime eliminated k=10223 from both the Sierpinski Problem and the Prime Sierpinski Problem. (official announcement)
    

About the Sierpinski Problem

Wacław Franciszek Sierpiński (14 March 1882 — 21 October 1969), a Polish mathematician, was known for outstanding contributions to set theory, number theory, theory of functions and topology. It is in number theory where we find the Sierpinski problem.

Basically, the Sierpinski problem is "What is the smallest Sierpinski number?"

First we look at Proth numbers (named after the French mathematician François Proth). A Proth number is a number of the form k*2^n+1 where k is odd, n is a positive integer, and 2^n>k.

A Sierpinski number is an odd k such that the Proth number k*2^n+1 is not prime for all n. For example, 3 is not a Sierpinski number because n=2 produces a prime number (3*2^2+1=13). In 1962, John Selfridge proved that 78,557 is a Sierpinski number...meaning he showed that for all n, 78557*2^n+1 was not prime.

Most number theorists believe that 78,557 is the smallest Sierpinski number, but it hasn't yet been proven. In order to prove it, it has to be shown that every single k less than 78,557 is not a Sierpinski number, and to do that, some n must be found that makes k*2^n+1 prime.

The smallest proven 'prime' Sierpinski number is 271,129. In order to prove it, it has to be shown that every single 'prime' k less than 271,129 is not a Sierpinski number, and to do that, some n must be found that makes k*2^n+1 prime.

Seventeen or Bust is working on the Sierpinski problem and the Prime Sierpinski Project is working on the 'prime' Sierpinski problem. The following k's remain for each project:

• Prime Sierpinski Project
  

For more information about Sierpinski, Sierpinski number, and the Sierpinsk problem, please see these resources:

• Wacław Franciszek Sierpiński (WIKI)
  
• Sierpinski number / The Sierpinski problem (WIKI)
  
• The Sierpinski problem (Prothsearch)
  

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.

Would 8 threads and 1 or 2 work units at a time be the best (for me) on AMD Ryzen 5900X and 7900X processors.
I have hyper-threading on and it will stay on as I will continue to run other projects on the 8 or 16 cores I don't use for the Primegrid challenge.

I am aware of some problems with running these large muli-threaded work units and I know they will be slower if I run at least 2 as that exceeds my physical core number (12), but I don't think it will be good running 3 at once due to slow down and heat (first month of Spring here in Australia but it is forecast to get to 30 degrees Celsius over the next few days).

Running 2 should be fine but I may just run the one as it will be a bit quicker or so I believe.

I have run 6 threads in the past and I think it was taking between 90 and 100 hours on SOB work units, so 8 should lower that even more (or maybe even 12).

Thanks
Conan

Challenge: World Peace Day - Day 1
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-14 05:36:14 UTC)

5365 tasks have been sent out. [CPU/GPU/anonymous_platform: 5365 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

705 (13%) were aborted. [705 (13%) / 0 (0%) / 0 (0%)]
11 (0%) came back with some kind of an error. [11 (0%) / 0 (0%) / 0 (0%)]
118 (2%) have returned a successful result. [118 (2%) / 0 (0%) / 0 (0%)]
4531 (84%) are still in progress. [4531 (84%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

108 (92%) are pending validation. [108 (92%) / 0 (0%) / 0 (0%)]
10 (8%) have been successfully validated. [10 (8%) / 0 (0%) / 0 (0%)]
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=40334194. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 0.99% as much as it had prior to the challenge!
____________

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

Challenge: World Peace Day - day 2 stats
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-15 05:35:59 UTC)

6687 tasks have been sent out. [CPU/GPU/anonymous_platform: 6687 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

1000 (15%) were aborted. [1000 (15%) / 0 (0%) / 0 (0%)]
26 (0%) came back with some kind of an error. [26 (0%) / 0 (0%) / 0 (0%)]
801 (12%) have returned a successful result. [801 (12%) / 0 (0%) / 0 (0%)]
4860 (73%) are still in progress. [4860 (73%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

360 (45%) are pending validation. [360 (45%) / 0 (0%) / 0 (0%)]
441 (55%) have been successfully validated. [441 (55%) / 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=40420331. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 1.21% as much as it had prior to the challenge!
____________

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

Challenge: World Peace Day - day 3 stats
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-16 05:36:22 UTC)

7935 tasks have been sent out. [CPU/GPU/anonymous_platform: 7935 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

1190 (15%) were aborted. [1190 (15%) / 0 (0%) / 0 (0%)]
39 (0%) came back with some kind of an error. [39 (0%) / 0 (0%) / 0 (0%)]
1626 (20%) have returned a successful result. [1626 (20%) / 0 (0%) / 0 (0%)]
5080 (64%) are still in progress. [5080 (64%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

569 (35%) are pending validation. [569 (35%) / 0 (0%) / 0 (0%)]
1057 (65%) have been successfully validated. [1057 (65%) / 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=40521370. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 1.46% as much as it had prior to the challenge!
____________

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

Challenge: World Peace Day
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-17 05:36:21 UTC)

9023 tasks have been sent out. [CPU/GPU/anonymous_platform: 9023 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

1380 (15%) were aborted. [1380 (15%) / 0 (0%) / 0 (0%)]
57 (1%) came back with some kind of an error. [57 (1%) / 0 (0%) / 0 (0%)]
2428 (27%) have returned a successful result. [2428 (27%) / 0 (0%) / 0 (0%)]
5158 (57%) are still in progress. [5158 (57%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

686 (28%) are pending validation. [686 (28%) / 0 (0%) / 0 (0%)]
1742 (72%) have been successfully validated. [1742 (72%) / 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=40587814. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 1.62% as much as it had prior to the challenge!
____________

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

Challenge: World Peace Day
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-18 05:36:08 UTC)

10302 tasks have been sent out. [CPU/GPU/anonymous_platform: 10302 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

1579 (15%) were aborted. [1579 (15%) / 0 (0%) / 0 (0%)]
409 (4%) came back with some kind of an error. [409 (4%) / 0 (0%) / 0 (0%)]
3373 (33%) have returned a successful result. [3373 (33%) / 0 (0%) / 0 (0%)]
4941 (48%) are still in progress. [4941 (48%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

737 (22%) are pending validation. [737 (22%) / 0 (0%) / 0 (0%)]
2636 (78%) have been successfully validated. [2636 (78%) / 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=40664444. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 1.82% as much as it had prior to the challenge!
____________

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

Challenge: World Peace Day
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-19 05:36:01 UTC)

11596 tasks have been sent out. [CPU/GPU/anonymous_platform: 11596 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

1990 (17%) were aborted. [1990 (17%) / 0 (0%) / 0 (0%)]
430 (4%) came back with some kind of an error. [430 (4%) / 0 (0%) / 0 (0%)]
4344 (37%) have returned a successful result. [4344 (37%) / 0 (0%) / 0 (0%)]
4832 (42%) are still in progress. [4832 (42%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

690 (16%) are pending validation. [690 (16%) / 0 (0%) / 0 (0%)]
3654 (84%) have been successfully validated. [3654 (84%) / 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=40740526. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 2.01% as much as it had prior to the challenge!

____________

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

Challenge: World Peace Day
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-20 05:36:07 UTC)

12977 tasks have been sent out. [CPU/GPU/anonymous_platform: 12977 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

2535 (20%) were aborted. [2535 (20%) / 0 (0%) / 0 (0%)]
438 (3%) came back with some kind of an error. [438 (3%) / 0 (0%) / 0 (0%)]
5308 (41%) have returned a successful result. [5308 (41%) / 0 (0%) / 0 (0%)]
4696 (36%) are still in progress. [4696 (36%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

642 (12%) are pending validation. [642 (12%) / 0 (0%) / 0 (0%)]
4666 (88%) have been successfully validated. [4666 (88%) / 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=40800226. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 2.16% as much as it had prior to the challenge!

____________

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

Challenge: World Peace Day
App: 13 (SoB)
Fast DC tasks are NOT included.
(As of 2023-09-23 05:35:51 UTC)

19250 tasks have been sent out. [CPU/GPU/anonymous_platform: 19250 (100%) / 0 (0%) / 0 (0%)]

Of those tasks that have been sent out:

7199 (37%) were aborted. [7199 (37%) / 0 (0%) / 0 (0%)]
923 (5%) came back with some kind of an error. [923 (5%) / 0 (0%) / 0 (0%)]
8427 (44%) have returned a successful result. [8427 (44%) / 0 (0%) / 0 (0%)]
2701 (14%) are still in progress. [2701 (14%) / 0 (0%) / 0 (0%)]

Of the tasks that have been returned successfully:

857 (10%) are pending validation. [857 (10%) / 0 (0%) / 0 (0%)]
7570 (90%) have been successfully validated. [7570 (90%) / 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=40949938. The leading edge was at n=39938854 at the beginning of the challenge. Since the challenge started, the leading edge has advanced 2.53% as much as it had prior to the challenge!
____________

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

Cleanup Status:

Sep 24: 300 tasks outstanding; 128 affecting individual (73) scoring positions; 36 affecting team (11) scoring positions.
Sep 25: 138 tasks outstanding; 53 affecting individual (36) scoring positions; 18 affecting team (5) scoring positions.
Sep 26: 39 tasks outstanding; 10 affecting individual (10) scoring positions; 1 affecting team (1) scoring positions.
____________

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