Easy:
Get mprime here.
Reserve your range.
Take the appropriate lines out of the file attached to the reservation post, and paste them into a file called worktodo.ini in your mprime directory.
Run a console and start ./mprime -m
Put in your options ( more memory, screen output every... and so on)
select Start test.
I wrote that from memory, if you run into trouble, call for help again. This guide is not yet for multicore CPU; for multicore, you better get the latest version 25.6, and you need to put your work into the two or more Workthreads, inside the file worktodo.txt. I have no multicore computer with Linux.
H.