diff --git a/functions/isprime.js b/functions/isprime.js
index 67263a0..b43e5bc 100644
--- a/functions/isprime.js
+++ b/functions/isprime.js
@@ -7,7 +7,7 @@ module.exports = {
   var upper = Math.sqrt(num);
   var sieve = new Array(num)
     .join(',').split(',') // get values for map to work
-    .map(function(){ return true });
+    .map(function(){ return "Prime" });
   
   for (var i = 2; i <= num; i++) {
     if (sieve[i]) {