Anonymous ID: fde42d June 12, 2023, 10:39 p.m. No.18997822   🗄️.is 🔗kun

>>18996681 pb

special digits confirm…

post number belongs to C2 symmetry group. 180˚ rotation about the center-point gives the same number…

equivalent to horizontal flip followed by vertical flip….

occurs much less frequently than repeating digits.