$ time make hs
    Results: [24639155,24977202,20874958]
    make hs  8.39s user 5.93s system 322% cpu 4.435 total

    $ time make py
    24894022
    25787638
    21979201
    make py  14.33s user 0.02s system 99% cpu 14.353 total

    $ time make py PYTHON=pypy3
    25059732
    25318854
    21254890
    make py PYTHON=pypy3  4.02s user 0.06s system 99% cpu 4.082 total