diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..5d8e1f4 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,25 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let primo;
+  if (
+    number == 2 ||
+    number == 3 ||
+    number == 5 ||
+    number == 7 ||
+    number == 11 ||
+    number == 13
+  ) {
+    primo = true;
+  } else {
+    primo =
+      number % 2 != 0 &&
+      number % 3 != 0 &&
+      number % 5 != 0 &&
+      number % 7 != 0 &&
+      number % 11 != 0 &&
+      number % 13 != 0
+        ? "true"
+        : "false";
+  }
+  return primo;
+}