Project Update

[Dingo]

[PrimeGrid] Another GFN 19 Found!
On 22 June 2024, 23:51:45 UTC, PrimeGrid's Generalized Fermat Prime Search found the Mega Prime: 9332124^524288+1 The prime is 3,654,278 digits long and will enter "The Largest Known Primes Database" ranked 12th for Generalized Fermat primes and 85th overall. The discovery was made by Detlef Lexut ([SG]KidDoesCrunch) of Germany using an NVIDIA GeForce RTX 3090 in an Intel(R) Core(TM) i9-10940X CPU @ 3.30GHz with 64GB RAM, running Microsoft Windows 11 Professional x64 Edition. This computer took about 27 minutes to complete the probable prime (PRP) test using Genefer23. Detlef Lexut is a member of the SETI.Germany team. The PRP was confirmed prime on 23 June 2024 by an AMD Ryzen 9 5950X @ 3.4GHz with 128GB RAM, running Linux Mint 20.3. This computer took about 15 hours, 43 minutes to complete the primality test using LLR. For more details, please see the official announcement.

View article · Mon, 15 Jul 2024 22:36:13 +0000

[Dingo]

[PrimeGrid] GFN 19 Found!
On 19 June 2024, 05:29:47 UTC, PrimeGrid's Generalized Fermat Prime Search found the Mega Prime: 10913140^524288+1 The prime is 3,689,913 digits long and will enter "The Largest Known Primes Database" ranked 11th for Generalized Fermat primes and 81st overall. The discovery was made by Heinrich Podsada (PoHeDa) of Germany using an NVIDIA GeForce RTX 3070 in an AMD Ryzen 9 5950X 16-Core Processor @ 3.40GHz with 64GB RAM, running Microsoft Windows 11 Professional x64 Edition. This computer took about 50 minutes to complete the probable prime (PRP) test using Genefer23. Heinrich Podsada is a member of the SETI.Germany team. The PRP was confirmed prime on 20 June 2024 by an AMD Ryzen 9 5950X @ 3.4GHz with 128GB RAM, running Linux Mint 20.3. This computer took about 15 hours, 56 minutes to complete the primality test using LLR. For more details, please see the official announcement.

View article · Mon, 15 Jul 2024 22:27:37 +0000

[Dingo]

PrimeGrid: Terence Tao's Birthday Challenge
From July 17 16:00 UTC to July 20 16:00 UTC PrimeGrid will be running a 3 day challenge on the AP27 project.
For more information, please see the challenge forum thread .14/07/2025 4:22:38 AM · more...
 

[Dingo]

PrimeGrid: Action Needed: Default venues reset
We've reset everyone's default venue to the blank or "---" venue. If you use the default venue to assign a venue to newly created hosts, for example hosts created on a cloud service, you will need to reassign this value.
We apologize for the inconvenience.
10/10/2025 10:21:02 PM · more...

[Dingo]

PrimeGrid: GFN-21 Prime Discovered; GFN-22 projected resumed
The first known GFN-21 prime has been discovered. More details will be released in the coming days. This is a 13 million digit prime that will enter the Top 5000 prime list as the 6th largest known prime.
With this discovery, our GFN-22 project has been restarted at b=400K. These numbers are 23 million digits in length.
14/10/2025 5:18:24 AM · more...

[Dingo]

I have been running GFN-17 on my RPI's for a long time.

[PrimeGrid] Windows/ARM suppport for GFN apps
PrimeGrid is happy to announce the release of ARM apps for Windows! For many GFN apps that support GPU tasks, we now offer Windows/ARM applications. Just select the CPU tasks in the project preferences page. The list of GFN apps that support Windows/ARM is subject to change. For the most up to date list, see the applications page. Look for "Microsoft Windows running on an ARM 64-bit CPU".

View article · Mon, 27 Apr 2026 19:26:09 +0000