mlucas(1) on Linux
The text 93d1fd1a4bf8, as Debian 10 (Buster) shipped it.
program to perform Lucas-Lehmer test on a Mersenne number, 2 ^ p - 1
Flags it lists
-
-f -
-fftlen -
-h -
-m -
-nthread -
-radset -
-s