diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..417092d 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,15 @@
 export function isPrime(value) {
-  // implementar logica aqui
-  
+  let prime;
+  let cont = 0;
+  for (let i = 0; i <= value; i++) {
+    if (value % i === 0) {
+      cont++;
+    }
+  }
+  if (cont > 2) {
+    return false;
+  } else {
+    return true;
+  }
+
 }
\ No newline at end of file