diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..17a08cf 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,9 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
+  for(let i = 2; i < value; i++)
+    if(value % i === 0) {
+        return false
+    };
+
+    return value > 1;
 }
\ No newline at end of file