diff --git a/isprime-python/app.py b/isprime-python/app.py
index d69560f..33cd755 100644
--- a/isprime-python/app.py
+++ b/isprime-python/app.py
@@ -17,7 +17,7 @@ def isprime():
     if num > 1:
         for i in range(2, num):
             if (num % i) == 0:
-                return "not prime"
+                return str(i)
         else:
             return "not prime"