First, make sure that you have unpacked mprime into its own working subdirectory and then make that subdirectory your working directory. Then, try ./mprime at a regular user terminal shell. You should see either text results below or some setup questions that then become the results below. About your running mprime processes, a computer restart will stop those if you can't kill them.
2. Test/Worker threads
10. Advanced/Manual Communication
11. Advanced/Unreserve Exponent
12. Advanced/Quit Gimps
15. Options/Torture Test
18. Help/About PrimeNet Server