https://bntr.livejournal.com/69664.html
2023 = 7×17²
_luden_
:
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(January 1 2023, 11:40:58 UTC) t390944
..
••• −• −−− •−− −•−− −− −−• −−− −•• −−− −− −−••−−
(January 1 2023, 11:40:58 UTC) t390944