Posts by Tomas Brada

41) Message boards : Number crunching : About Stop@home project (Message 4897) Posted 21 Nov 2019 by Tomas Brada Post: If there is new, more important interval to search for symmetric tuples in, please let me know. I can send it with priority.
42) Message boards : Number crunching : About Stop@home project (Message 4820) Posted 10 Nov 2019 by Tomas Brada Post: I started generating workunits at 510091544778180900. XAVER did not answer what he checked in 5,1010^17 range, so I took the last tuple from his message about 5,1010^17. When it is generated, I will post on my forum the exact range and count.
43) Message boards : Number crunching : About Stop@home project (Message 4819) Posted 10 Nov 2019 by Tomas Brada Post: I improved the results page. You can use this link to view all tuples of k=22: https://boinc.tbrada.eu/spt_list.php?k=20 Or use this link to show only recetn (>18000) tuples of k=16: https://boinc.tbrada.eu/spt_list.php?k=18&i=16000 Please see the warning here.
44) Message boards : Number crunching : About Stop@home project (Message 4816) Posted 10 Nov 2019 by Tomas Brada Post: There are now 5 k=22 in batch 48! Also I noticed that the project is running dry. Time to generate more workunits. XAVER, what intervals did you check past 510e15? Next, I realize that the current form of representation of results is not ideal. How can I improve it? Query by the central prime, by database id, or by k?
45) Message boards : Number crunching : About Stop@home project (Message 4762) Posted 4 Nov 2019 by Tomas Brada Post: k=22 found! First in project. 503650661762068811: 0 2 48 126 162 170 198 216 246 258 308 330 380 392 422 440 468 476 512 590 636 638
46) Message boards : Number crunching : Проект TBEG недоступен (Message 4734) Posted 30 Oct 2019 by Tomas Brada Post: I prepared a explanation page, that should display whenever the server is offline, but it does not work it seems. Instead error "404 - Stránka nebyla nalezena" is shown.
47) Message boards : Number crunching : Проект TBEG недоступен (Message 4733) Posted 30 Oct 2019 by Tomas Brada Post: Project server down. I am changing disks. It was not planned to shut down, but one adapter (dongle) become broken, so I had to interrupt online operation and continue offline. Of course, backup was taken prior.
48) Message boards : Number crunching : About Stop@home project (Message 4648) Posted 19 Oct 2019 by Tomas Brada Post: Natalia Makarova. I selected the interval starting at 501e15 to not step on your and Xaver's toes. The workunits ran out quickly! Already more need to be generated. I will continue from the place I left, but I can also load somewhere at 5003e14 if you want.
49) Message boards : Number crunching : About Stop@home project (Message 4614) Posted 14 Oct 2019 by Tomas Brada Post: TBEG is now checking interval 500002700000000000 .. 500007900000000000.
50) Message boards : Number crunching : About Stop@home project (Message 4601) Posted 13 Oct 2019 by Tomas Brada Post: Is there any interest in symmetric k-tuples for k greater than 32? My BOINC will be able to search up to 64, if desired. Or k less than 16?
51) Message boards : Number crunching : Проект TBEG недоступен (Message 4600) Posted 13 Oct 2019 by Tomas Brada Post: The TLS configuration was automatically updated as a part of the certificate renewal. This update removed some weak and obsolete cipher suites. Unfortunately browser on Windows 7 and lower does not support any of the new-enabled ciphers which broke the connection. The reason behing this change is that the affected browsers (some internet explorer and android versions) are deprecated and should not be used any more. However many people still use them, so I re-eabled two strongest of the weak ciphers despite the recommendation. We are not a Bank, so weak cipher is better than the site not working. If your browser is recent, chacha/poly will be used by preference, which is light on the server and very secure.
52) Message boards : Number crunching : Проект TBEG недоступен (Message 4592) Posted 12 Oct 2019 by Tomas Brada Post: My appologies for neglecting this forum. On 8.10.2019 (4 days ago) the website certificate was renewed (using script). The certificate provider is Let's Encrypt. Few days later, I was notified that Natalia could not access the website. I could access the website just fine as well as many computers running boinc. Yesterday I started investigation and today I continue investigating the issue. I used this tool https://www.uptrends.com/tools/uptime to check the website. It shows that the website is accessible in some parts of the world and inaccessible in others. The distribution of failures is very unusual. In all continents, some cities can access, some can't. I checked DNS provider. It is paid and OK. I checked DNS resolution worldwide, no failures either. I am starting to suspect that it is something with the SSL certificate.
53) Message boards : Number crunching : About Stop@home project (Message 4579) Posted 11 Oct 2019 by Tomas Brada Post: Oh, I just noticed the mistake. Now it works. Still, it is written in a way that it's not easy to understand. This is a good start. Program works, I can compile it.
54) Message boards : Number crunching : About Stop@home project (Message 4578) Posted 11 Oct 2019 by Tomas Brada Post: Good day. I compiled the program (kpppch_16_do_32.cpp), after minor modifications needed for linux. But I do not think it's correct. It ignores most of the primes without ever checking them. And it failed to find the tuples you already posted in this thread. I think I am able to modify the program to work correctly. Did you sent me some old version by accident?
55) Message boards : Number crunching : About Stop@home project (Message 4555) Posted 8 Oct 2019 by Tomas Brada Post: I started writing the server-side support for search of these interesting prime tuples.
56) Message boards : Number crunching : About Stop@home project (Message 4529) Posted 6 Oct 2019 by Tomas Brada Post: It is a pity that the project went down. But that would not be bad. The worst part is that the solutions were lost. I see that we have a good program for computation. Is the source code available? Please send it to me. It seems that it is again a search-in-interval type of computation. I have good experience with such type, so it fits the infrastructure that I already built. Again, no promises.
57) Message boards : Science : ODLK2 Server hosting PADLS experiment (Message 4012) Posted 27 Jun 2019 by Tomas Brada Post: Another export. Hopefully the last one before automated publishing. https://boinc.tbrada.eu/forum_thread.php?id=3023&postid=3358 Enjoy!
58) Message boards : Science : ODLK2 Server hosting PADLS experiment (Message 3956) Posted 21 Jun 2019 by Tomas Brada Post: The results are safely in my database. I will see how to best export them. I want to automate it, in the future.
59) Message boards : Science : ODLK2 Server hosting PADLS experiment (Message 3954) Posted 21 Jun 2019 by Tomas Brada Post: The application on my server is running and is stable. 9622 workunits completed. I noticed that you are experimenting in other rulers. What to do now? I would like someone to look at the code if there are no errors. My application can run in any ruler. Even multiple at once. So which one to run? Continue rule 51? Application for windows is now a priority.
60) Message boards : Science : Задача (Message 3761) Posted 30 May 2019 by Tomas Brada Post: I played for a bit and found that there are no CF from "0 9 8 7 6 4 5 2 3 1 9 1 7 8 5 6 3 4 2 0 7 8 2 6 1" to the end of rules. Nothing extraordinary, I know. Next, I added a checkpoint feature to the program. It works for me, but I need to verify and prepare it for release. First SNDLK is in start.txt, like before. Every 10 seconds program writes the most recent SNDLK to file checkpoint.txt. If interrupted, you can copy the checkpoint.txt file to start.txt and resume. Also every 10 seconds all found CF are written. In the boinc project, workunit will run for limited time, say one hour. Checkpoint and results will be uploaded and then next batch of workunits can continue where the previous left. All will be checked, including double check for rule 51. No experiments. If I do experiments, those will be separate and I will not let it interfere with the results. But question: What are the groups? I understand that it is the first line, but how number 3102 relates to 0 5 4 7 8 6 9 2 3 1 ?

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