diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..b3b6f2a 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,13 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
+  if(value == 0 || value == 1) {
+    return false
+}
+
+for(let div = 2; div <= Math.sqrt(value); div++){
+    if(value % div == 0) {
+        return false
+    }
+}
+return true
 }
\ No newline at end of file