diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..3d7d0c7 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,6 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
+      for (let div = 2; div < value; div++) 
+      if (value % div == 0) return false;
+      return true;
 }
\ No newline at end of file