class FindNthRrime{

    public static void main(String a[]) {
      find(7);
    }
      static void find(int n){
        int i=0,count=2;
        if(n==1)
        {
            System.out.println("1st prime =2");
            return;
        }
        if(n==2)
        {
            System.out.println("2nd prime =3");
            return;
        }

        while(true)
        {
            for(int j=2;j<=i/2;j++){
            if(i%j==0)
            break;
            else if(j==i/2)
            {
            count++;
            }
        }
        if(count==n)
        {
        System.out.println(n+"th prime ="+i);
        break;
        }
        i++;
        }
    }
    }