If you want to generate a vanity nostr npub like mine, feel free to try the dead simple yet fast tool I wrote for it: 
GitHub
GitHub - chawyehsu/nostr-vanity-address-generator: Fast Nostr Vanity Address Generator (Windows, Linux and macOS)
Fast Nostr Vanity Address Generator (Windows, Linux and macOS) - chawyehsu/nostr-vanity-address-generator