diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..29ecf74 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,15 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
+  if(value == 2){
+    return true;
+  }
+  else if (value == 1){
+    return false
+  }
+  for(let i = 2; i < value; i++){
+    if(value % i == 0){
+      return false
+    }
+  }
+  return true;
 }
\ No newline at end of file