3 ms·

Alternative wording: the ratios of these pairs (13 days / 247zs) and (247zs / t_P) are approximately the same. t_P being the Planck time here.

• SilasX 6y ago
  Another alternate wording: 247 zs is the geometric mean of t_P and 13.1 days.
  • waheoo 6y ago
    Planck time, 247 zeptoseconds, and 13.1days are equally far apart on log scale. Planck time is really small.
    • pwr22 6y ago
      Thanks, I can understand this one :P