Added special cases for Python3, Python, PyPy and LuaJIT.

test: all

	@ time -f "%C : %E seconds" ./a.out $(ROUNDS) > /dev/null

	@ [ -n "$$(which python3)" ] && time -f "%C : %E seconds" ./prime.py $(ROUNDS) > /dev/null

	@ [ -n "$$(which python)" ] && time -f "%C : %E seconds" ./prime.py $(ROUNDS) > /dev/null

	@ [ -n "$$(which python3)" ] && time -f "%C : %E seconds" python3 prime.py $(ROUNDS) > /dev/null

	@ [ -n "$$(which pypy)" ] && time -f "%C : %E seconds" pypy  prime.py $(ROUNDS) > /dev/null

	@ [ -n "$$(which lua)" ] && time -f "%C : %E seconds" ./prime.lua $(ROUNDS) > /dev/null

	@ [ -n "$$(which luajit)" ] && time -f "%C : %E seconds" luajit prime.lua $(ROUNDS) > /dev/null

	@ [ -n "$$(which php)" ] && time -f "%C : %E seconds" ./prime.php $(ROUNDS) > /dev/null

	@ [ -n "$$(which php7.0)" ] && time -f "%C : %E seconds" php7.0 prime.php $(ROUNDS) > /dev/null

	@ [ -n "$$(which ruby)" ] && time -f "%C : %E seconds" ./prime.rb $(ROUNDS) > /dev/null

#!/usr/bin/env python3

#!/usr/bin/env python

from __future__ import (absolute_import, division,

                        print_function, unicode_literals)

def is_prime(x):

    from math import sqrt, ceil

    if sqrt(x).is_integer():

        return False

    for i in range(2, ceil(sqrt(x))):

    for i in range(2, int(ceil(sqrt(x)))):

        if x % i == 0:

            return False

    return True