diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..bf896f6 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,14 @@
 export function isPrime(value) {
   // implementar logica aqui
+  let div = 0;
+  let i;
+  for (i = 1; i <= value; i++) {
+    if ((value % i) == 0)
+      div++;
+  }
+  if (div === 2)
+    return true;
+  else
+    return false
   
 }
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