update Prime

Author: TlesovIvan

app/src/main/java/hexlet/code/games/Prime.java

@@ -5,6 +5,7 @@
 import java.util.Random;
 
 public class Prime {
+    static final int SECONDUSUALNUMBER = 3;
     public static String[][] generateQA() {
         Random random = new Random();
         String[][] questionAnswer = new String[Engine.MAXROUNDCOUNTER][2];
@@ -25,7 +26,7 @@ public static String isPrime(int number) {
         if (number % 2 == 0) {
             return "no";
         }
-        for (int i = 3; i < (int) Math.sqrt(number); i += 2) {
+        for (int i = SECONDUSUALNUMBER; i < (int) Math.sqrt(number); i += 2) {
             if (number % i == 0) {
                 return "no";
             }