diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..bebebf8 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,11 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
+
+  let numberOfDivisors = 0
+  for (let i = 1; i <= value; i++) {
+    if ((value % i) === 0) {
+      numberOfDivisors++;
+    }
+  }
+  return (numberOfDivisors === 2) ? true : false
 }
\ No newline at end of file