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An update on PPS doublecheck / LLR2 testing

PrimeGrid PPS doublechecking, which is currently running on "LLR2 testing" subproject, almost finished testing of all suspicious candidates above 3M for all k's.

On the next step, we'll continue moving backward. Next range to verify will be 2M-3M, which consist of following subranges:
a) k=5..99, n=2M-3M - 1097913 tests;
b) k=101..299, n=2M-3M - 2199660 tests;
c) k=301..1199, n=2M-2.4M - 4124064 tests;

Despite higher number of tests, each individual test will be noticeable faster. For example, test at n=2M is two times faster than test at n=3M.
7 Oct 2021, 9:48:59 UTC


GFN-13 MEGA is finished!

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

The project is officially finished and closed now. Five GFN-13 MEGA primes were found! Thank you!
30 Jul 2021, 16:27:41 UTC


GFN-13 MEGA is over, GFN-12 MEGA will be started soon

GFN-13 MEGA is coming to the end. No new tasks will be available soon.

It will be replaced by next project in series, GFN-12 MEGA. Estimated start date for new project was changed to Monday, 26 July, 09:00 UTC.
20 Jul 2021, 19:38:55 UTC


PPS-MEGA double-check finished, PPS DC started

Verification of PPS-MEGA PrimeGrid work (currently running in "LLR2 testing" subproject) is complete! It mean that all PrimeGrid work which can produce a Mega prime (n > 3,32M) has been validated to be sure that each test have either two matching results from different users, either mathematical proof of correctness (LLR2). During verification, we found a missed prime 65·23369359+1.

On the next phase, we will validate PPS work, i.e. tests with n < 3,32M. We will start in range 3M-3,32M for applicable k's and go down - i.e. when this range will be finished, we'll test 2M-3M, then 1M-2M, and so on. As we'll go down, tasks will became shorter and shorter and will be completed faster.
27 May 2021, 18:47:43 UTC


"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 from 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 65·23369359+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


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


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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