This is a GPU based vanity key finder. It does not currently use a CSPRNG and any key generated by this tool is 100% not secure to use. Great fun for Tour de Sol though.
Open src/config.h and add any prefixes you want to scan for to the list.
Make sure your cuda binary are in your path, and build:
$ export PATH=/usr/local/cuda/bin:$PATH
$ make -j$(nproc)LD_LIBRARY_PATH=./src/release ./src/release/cuda_ed25519_vanity