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"GFN-1x Small Primes" is restarted

The "GFN-1x Small Primes" project will be restarted Monday, 26 April 2021, at 09:00 UTC. In the second phase, we will test GFN-13 between 400M to 2000M.

See PrimeGrid forum post for full announce
23 Apr 2021, 12:19:10 UTC


GFN-14 MEGA is finished!

13 Apr 2021, last GFN-14 MEGA workunit was returned and validated, finishing cleanup of the project at bmin+600000.

The project is officially finished and closed now. Two GFN-14 MEGA primes were found. Thank you!
13 Apr 2021, 6:11:15 UTC


GFN-13 MEGA Project will be started 2021-03-27

Next project in GFN-MEGA series, GFN-13 First MEGA Prime Search, will be started March 27, 2020, at 09:00 UTC. It replaces finished GFN-14 MEGA project. Please check a thread on PrimeGrid GFN Forum for full announcement and instructions.
27 Mar 2021, 6:37:10 UTC


We're on The Science Cloud!

GFN Server is now supported on The Science Cloud (TSC). TSC is a service where you can buy preconfigured Boinc virtual machines and attach them to supported Boinc servers with just a few mouse clicks. It's useful when running your own hardware can be costly due to high electricity/cooling prices, or if you just want to spend few bucks to give yourself or your team a boost in the challenge.
26 Mar 2021, 6:01:40 UTC


Missed PPS-MEGA Prime found!

The "LLR2 Testing" project, which is currently double-checking suspicious PPS-MEGA results from PrimeGrid, has found a missed 1014280-digits prime 65ยท23369359+1. Congratulations to Kellen!
27 Jan 2021, 18:26:00 UTC


New project - Search for small GFN primes

New GPU project, GFN-1x Small Primes, will be started January 21 2021 at 09:00 UTC

Please see PrimeGrid forum thread for full announcement.
19 Jan 2021, 12:30:52 UTC


GFN-14 Project is finished!

10 Jan 2021, last GFN-14 task (do not confuse with GFN-14 MEGA) was returned and validated!

GFN-14 was second public project on this server, started in October 2017. In these years, we did two-pass testing of all candidates up to 400M, finding 10143 new GFN-14 primes and double-checking 161 previously known. A list of known GFN-14 primes is updated.

Thank you very much - all of you who participated in this project! 10 Jan 2021, 12:55:33 UTC


GFN-14 MEGA Project will be started 2020-12-05

Next project in GFN-MEGA series, GFN-14 First MEGA Prime Search, will be started December 05, 2020, at 09:00 UTC.

Please check a thread on PrimeGrid GFN Forum for full announcement and instructions. 3 Dec 2020, 19:35:27 UTC


GFN-15 MEGA Project is finished!

02 Dec 2020, last GFN-15 MEGA workunit was returned and validated, finishing cleanup of the project at bmin+1000000.

The project is officially finished and closed now. Thank you! 1 Dec 2020, 21:40:40 UTC


Another GFN-15 MEGA prime!

In previous message, I said that it's unlikely to find a prime during cleanup of remaining tasks, but we did it!

20 Jul 2020, 09:23:53 UTC, PDW found a prime 3292665455999520712131951625894^32768+1 (bmin + 347634). This prime is less then previous one and will be new both lowest GFN-15 MEGA prime and numerically lowest prime with exactly 1,000,000 digits. Congratulations! 22 Jul 2020, 5:22:07 UTC


GFN-15 MEGA Prime found!

17 Jul 2020, 01:58:27 UTC tng found a prime 3292665455999520712131951642528^32768+1 (bmin + 364268).

If we didn't find another smaller prime during cleanup of remaining tasks (which is unlikely), it'll be new numerically lowest prime with exactly 1,000,000 digits.

The goal of GFN-15 MEGA project has been reached. It will continue to run and new work will be loaded until 27 Oct 2020. Then, after cleanup of remaining tasks, project will be shut down. 17 Jul 2020, 16:37:21 UTC


GFN-15 MEGA Project will be started 2020-06-27

GFN-15 First MEGA Prime Search will be started June 27, 2020, at 12:00 UTC.

Please check a thread on PrimeGrid GFN Forum for full announcement and instructions. 26 Jun 2020, 21:31:59 UTC


GFN-16 Project is finished!

05 May 2020, last GFN-16 workunit was returned and validated, finishing cleanup of the project at bmin+310000.

The project is officially finished and closed now. Thank you! 6 May 2020, 19:02:16 UTC


GFN-13 Project is finished!

01 May 2020, last GFN-13 task was returned and validated!

GFN-13 was first public project on this server, started in October 2016. In these years, we did two-pass testing of all candidates up to 400M, finding 21201 new GFN-13 primes and double-checking 902 previously known.

Thank you very much - all of you who participated in this project! 3 May 2020, 12:36:22 UTC


GFN-16 MEGA Prime found!

9 Mar 2020, 10:18:50 UTC Robish found a prime 1814570322977518^65536+1 (bmin + 284148). This test took about 2 hours 30 minutes to complete using 3 threads. The prime was double-checked by vanos0512.

If we didn't find another smaller prime during cleanup of remaining tasks (which is unlikely), it'll be new numerically lowest prime with exactly 1,000,000 digits.

9 Mar 2020, 20:41:52 UTC Robish found a prime 1814570322984178^65536+1 (bmin + 290808). This test took about 5 hours 13 minutes to complete using 2 threads. The prime was double-checked by me and dukebg.

The goal of GFN-16 MEGA project has been reached. It will continue to run and new work will be loaded at least until April 15. Then, after cleanup of remaining tasks, project will be shut down. 17 Mar 2020, 17:44:27 UTC


A note to new users

Although all applications on this server will run out of box, some manual tweaking via app_config.xml is recommended for advanced users to get maximum performance out of fast modern GPUs and multi-core processors.

Please consider reading following posts on PrimeGrid forum (they include registration instructions and invitation code as well):

GFN-16 MEGA Prime Search (how to setup multi-threaded LLR);
GFN-13 / GFN-14 Prime Search (run 3-4 tasks in parallel to fully utilize modern GPUs). 2 Oct 2019, 12:11:11 UTC


GFN-16 First MEGA Prime search started March, 14, 2019

Please see PrimeGrid forum for description and instructions. 14 Mar 2019, 13:00:27 UTC


GFN-13 Consecutive Primes Hunt is complete

The GFN-13 Consecutive Primes search was completed 2019-02-26 in 63 days, finding one extra pair. Currently total of 3 pairs are known for GFN-13 in 0M-400M range.

We're running traditional search for primes on all remaning candidates of GFN-13 and GFN-14 now.
28 Feb 2019, 8:09:07 UTC






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