74*941^348034-1 found by Max_Pirx (1034913 digits)

8343*42^560662+1 found by Ralfy (910099 digits)

1616*277^242731-1 found by whizbang (592869 digits)
5916*277^252878-1 found by CharityEngine1 (617654 digits)

After long drought, I got one:

[URL="https://primes.utm.edu/primes/page.php?id=130377"]65077 *2^3605944+1 is prime! [/URL]

This removes a k from the S16 search. Many thanks to Gary for helping to get this posted at the top 5000 primes site. ...and everything else he does for the CRUS project.

[QUOTE=masser;536765]After long drought, I got one:

[URL="https://primes.utm.edu/primes/page.php?id=130377"]65077 *2^3605944+1 is prime! [/URL]

This removes a k from the S16 search. Many thanks to Gary for helping to get this posted at the top 5000 primes site. ...and everything else he does for the CRUS project.[/QUOTE]

Since it is plus side you can now test it on GPU with Proth 2.0

[QUOTE=pepi37;536773]Since it is plus side you can now test it on GPU with Proth 2.0[/QUOTE]

Not just any GPU. It has to be an OpenCL GPU, right? Doesn't that generally mean AMD GPU?

[QUOTE=masser;536775]Not just any GPU. It has to be an OpenCL GPU, right? Doesn't that generally mean AMD GPU?[/QUOTE]

OpenCL is supported on NVIDIA and AMD GPUs as long as you have a driver for it. CUDA is NVIDIA specific.

1338*177^229389+1 found by CharityEngine1 (515664 digits)
2152*177^270059+1 found by stoneageman (607089 digits)
1536*177^347600+1 found by stoneageman (781399 digits)
1126*177^391360+1 found by Doug (879770 digits)

20*317^218953+1 is prime (547616 digits)


S317 is now a 1k'er. :smile:

[URL="https://primes.utm.edu/primes/page.php?id=130267"]17 · 962^192155 + 1[/URL]

81*984^214452+1 (641856 digits)
19*984^257291+1 (770072 digits)