diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..b939402 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 >= 2;
 }
\ No newline at end of file