diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..c786304 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,12 @@
 export function isPrime(value) {
-  // implementar logica aqui
-  
-}
\ No newline at end of file
+    // implementar logica aqui
+    if (value <= 1) {
+        return false
+    }
+    for (let i = 2; i < value; i++) {
+        if (value % i === 0) {
+            return false
+        }
+    }
+    return true
+}