Enumerate the exercises

06_prime_numbers.lua

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+-- Write a function to determine whether a given number is prime.
+--
+-- Solution --------------------------------------------------------------------
+function is_prime(x)
+	-- Your implementation here
+end
+
+-- Tests -----------------------------------------------------------------------
+
+local luaunit = require("luaunit.luauint")
+
+function test_1_is_not_prime()
+	luaunit.assertFalse(is_prime(1))
+end
+
+function test_2_is_prime()
+	luaunit.assertTrue(is_prime(2))
+end
+
+function test_15_is_not_prime()
+	luaunit.assertFalse(is_prime(15))
+end
+
+function test_441_is_not_prime()
+	luaunit.assertFalse(is_prime(441))
+end
+
+function test_563_is_prime()
+	luaunit.assertTrue(is_prime(563))
+end
+
+os.exit(luaunit.LuaUnit.run())