import java.util.Random;
/**
* @Author: Cool_Wu
* @Date: 2020-11-04 21:39
*/
public class Test {
public static void main(String[] args) {
Random random = new Random();
int num = 0;
for (int i = 0; i < 50; i++){ //循环50次
num = random.nextInt(999) + 1; //取0 ~ 1000之间的随机数
boolean flag = false; //标记:默认是素数
if (num < 2){
flag = true; //修改标记:不是素数
}
for (int j = 2; j < num; j++){
if (num%j == 0){
flag = true; //不是素数
break;
}
}
System.out.println(num + (flag?"不是":"是") + "素数");
}
}
}