diff --git a/prime_num.java b/prime_num.java
new file mode 100644
index 0000000..98788a2
--- /dev/null
+++ b/prime_num.java
@@ -0,0 +1,22 @@
+public class Main {
+
+    public static void main(String[] args) {
+        System.out.println(isPrime(5));
+    }
+    public static boolean isPrime(int x){
+        if( x <= 1)
+            return false;
+        else if( x ==2 )
+            return true;
+        else if (x % 2 == 0)
+            return false;
+
+        // If not, then just check the odds
+        for (int i = 3; i <= Math.sqrt(x); i += 2)
+        {
+            if (x % i == 0)
+                return false;
+        }
+        return true;
+    }
+}