public class Prime{
public static void main(String arg[]){
int num = 1, count = 0, i;
do{
if(num == 1 || num == 2){
System.out.printf("%6d", num);
count++;
}
else{
for(i = 2;i < num; i++)
if(num%i == 0) break;
if(i == num){
System.out.printf("%6d", num);
count++;
if(count % 10 == 0)System.out.println("");
}
}
num++;
}while(count < 50);
}
}