diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index 9412ea0..0880725 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,16 @@
 export function isPrime(value) {
   // implementar logica aqui
-
+  { if ( value === 1 ) { 
+    return false;
+    } else if ( value === 2 ) { 
+        return true; 
+        } else { 
+            for ( var x = 2; x < value; x++ ) { 
+                if ( value % x === 0 ) { 
+                    return false; 
+                } 
+            } 
+            return true; 
+        } 
+    } 
 }
\ No newline at end of file