From 744657905fc25ecb9128f6bf8e63366db7fda030 Mon Sep 17 00:00:00 2001
From: shellhub <shellhub.me@gmail.com>
Date: Sat, 5 Oct 2019 19:28:55 +0800
Subject: [PATCH] optimization

---
 Maths/PrimeCheck.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Maths/PrimeCheck.java b/Maths/PrimeCheck.java
index cdfb44dc1..dc357dacd 100644
--- a/Maths/PrimeCheck.java
+++ b/Maths/PrimeCheck.java
@@ -27,7 +27,7 @@ public class PrimeCheck {
         if (n < 2 || n % 2 == 0) {
             return false;
         }
-        for (int i = 3; i <= Math.sqrt(n); i += 2) {
+        for (int i = 3, limit = (int) Math.sqrt(n); i <= limit; i += 2) {
             if (n % i == 0) {
                 return false;
             }