diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..d33bcde 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