Still is a coincidence. If the original post emphasized this fact of reliance on 5-3-2 prime factors, then the post would have been only a bit more interesting

Still is a coincidence. If the original post emphasized this fact of reliance on 5-3-2 prime factors, then the post would have been only a bit more interesting. But even had the original post simply been "Our timekeeping leans heavily on 5-3-2 factors", that still isn't terribly impressive. Little point in hacker news users upvoting every little such coincidence. There's a large number of similar trivial coincidences if one bothered to look.