public String getAnswer(){
    for(int i = 2; i < PRIMESBELOW; i++)
      if(NUMS[i] == false)
        sieve(i);
    long answer = 0;
    for(int i = 2; i < PRIMESBELOW; i++)
      if(NUMS[i] == false){
        answer += (long)i;
      }
    System.out.println(answer);
    return String.valueOf(answer);
  }