Hello I am trying to pull all actors/actresses from DB. Do all the ID numbers between 1 - latest return valid people?

while (i < 100000) { NSString *num = [NSString stringWithFormat:@"%i", i];

    NSString *personURL = [@"https://api.themoviedb.org/3/person/" stringByAppendingString:num];

    personURL = [personURL stringByAppendingString:@"?api_key=XXXXXXXXXXXXXXXXXXXXXXXXXXX&append_to_response=images"];

I am getting some return values that say invalid ID.