This one won't use GPUs and python is pretty slow.
VanitySearch is the name of it on GitHub, I'm a bit too lazy to find the link right now, it's in one of my older notes about GPU mining if you wanna look.
Discussion
But how to specify if i want npub
If you about this https://github.com/JeanLucPons/VanitySearch but it doesn't support nostr keys.