diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..d3d70d2 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,9 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
+  for (let x = 2; x < value; x++) {
+    if (value % x === 0 || value <= 1) {
+      return false;
+    }
+  }
+  return true;
 }
\ No newline at end of file