diff --git a/mathgen.py b/mathgen.py
index 0496c70..b0a426a 100644
--- a/mathgen.py
+++ b/mathgen.py
@@ -1,16 +1,23 @@
-def isprime(max_a = 100):
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+
+def isprime(max_a=100):
     a = random.randint(2, max_a)
     problem = a
     if a == 2:
         solution = True
-        return problem, solution
-    if a%2 == 0:
+        return (problem, solution)
+    if a % 2 == 0:
         solution = False
-        return problem,solution
-    for i in range(3, (a//2)+1, 2):
-        if a%i == 0:
+        return (problem, solution)
+    for i in range(3, a // 2 + 1, 2):
+        if a % i == 0:
             solution = False
-            return problem, solution
+            return (problem, solution)
     solution = True
-    return problem, solution
-is_prime = Generator("isprime", 74, "a any positive integer", "True/False", isprime)
+    return (problem, solution)
+
+
+is_prime = Generator('isprime', 74, 'a any positive integer',
+                     'True/False', isprime)