diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..41ab310 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,22 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  for (let i = 2; i < value; i++)
+  if (value % i === 0) {
+      return false;
+  }
+return value > 1;
+}
+
+// Resultados esperados
+console.log(isPrime(2), true) // true
+console.log(isPrime(3), true) // true
+console.log(isPrime(4), false) // false
+console.log(isPrime(5), true) // true
+console.log(isPrime(6), false) // false
+console.log(isPrime(7), true) // true
+console.log(isPrime(8), false) // false
+console.log(isPrime(25), false) // false
+console.log(isPrime(31), true) // true
+console.log(isPrime(2017), true) // true
+console.log(isPrime(2048), false) // false
+console.log(isPrime(1), false) // false
\ No newline at end of file