diff --git a/isprime-python/app.py b/isprime-python/app.py
index de64bd6..51672d3 100644
--- a/isprime-python/app.py
+++ b/isprime-python/app.py
@@ -5,9 +5,19 @@ from flask import Flask
 app = Flask(__name__)
 
 @app.route('/')
-def hello_world():
-    target = os.environ.get('TARGET', 'World')
-    return 'Hello {}!\n'.format(target)
+def isprime():
+  n = os.environ.get('TARGET', '42069')
+  if n == 2 or n == 3: return "Prime"
+  if n < 2 or n%2 == 0: return "Not Prime"
+  if n < 9: return "Prime"
+  if n%3 == 0: return "Not Prime"
+  r = int(n**0.5)
+  f = 5
+  while f <= r:
+    if n%f == 0: return "Not Prime"
+    if n%(f+2) == 0: return "Not Prime"
+    f +=6
+  return "Prime"
 
 if __name__ == "__main__":
-    app.run(debug=True,host='0.0.0.0',port=int(os.environ.get('PORT', 8080)))
+  app.run(debug=True,host='0.0.0.0',port=int(os.environ.get('PORT', 8080)))