On 26 May 2023, 01:04:36 UTC, PrimeGrid’s AP27 Search (Arithmetic Progression of 27 primes) found the progression of 27 primes:
277699295941594831+170826477*23#*n for n=0..26
This is the second known AP27.
The discovery was made by Tom Greer (tng) of the United States using a NVIDIA GeForce RTX 4080 on an AMD Ryzen 9 7950X CPU @ 4.50GHz running Microsoft Windows 10 Professional x64 Edition. This computer took about 4 minutes and 22 seconds to process the task (each task tests 100 progression differences of 10 shifts each). Tom Greer is a member of the Antarctic Crunchers team.
The AP27 task was double checked by Vasil Zakiev (zvasi_000) of Russia and was returned on 26 May 2023 01:04:39 UTC. This task was run on an NVIDIA GeForce RTX 4090 on an AMD Ryzen 9 7950X CPU @ 4.50GHz running Microsoft Windows 11 Professional x64 Edition. The double check took about 1 minute and 27 seconds to complete. Vasil Zakiev is a member of the Crystal Dream team.
For more details, please see the official announcement.