diff --git a/05-é-primo/index.html b/05-é-primo/index.html
index e7ad135..25d6b17 100644
--- a/05-é-primo/index.html
+++ b/05-é-primo/index.html
@@ -16,28 +16,12 @@
         */
         function isPrime(number) {
             // implementar logica aqui
-            if (number === 2 || number === 3) return true
-            if (number % 2 === 0 || number < 2) return false
-
-            var s = 0,
-                d = number - 1
-            while ((d & 1) == 0) {
-                d >>= 1
-                ++s
-            }
-
-            let base = 2
-            var x = Math.pow(base, d) % number
-
-            if (x == 1 || x == number - 1) return true
-
-            for (var i = 1; i <= s; i++) {
-                x = (x * x) % number
-
-                if (x === number - 1) return true
-            }
-            return false
-        }
+            for (let i = 2; i < number; i++)
+                if (number % i === 0) {
+                    return false;
+                }
+            return number > 1;
+        }        
 
         // Resultados esperados
         console.log(isPrime(2), true) // true