Yes that's what I thought too (which is why I found the complaint hard to understand until I thought of the alternative interpretation). But clearly at least th

Yes that's what I thought too (which is why I found the complaint hard to understand until I thought of the alternative interpretation). But clearly at least the person I was replying to understood it differently, and it was also the top comment on this thread for a while at the time I posted my comment, so others may have thought the same too. Even at the question, on a comment on the answer the asker mentions "why these numbers are special" and comments about them being prime etc, so it's possible they didn't have a clear idea what they wanted either.