diff --git a/functions/isprime.py b/functions/isprime.py
new file mode 100644
index 0000000..c30909f
--- /dev/null
+++ b/functions/isprime.py
@@ -0,0 +1,14 @@
+def isprime(event,context):
+  n= event['data']
+  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:
+    print '\t',f
+    if n%f == 0: return "Not Prime"
+    if n%(f+2) == 0: return "Not Prime"
+    f +=6
+  return "Prime"