3 ms·

Probably more of a hat tip to this one: https://www.ioccc.org/2000/natori/index.html https://www.ioccc.org/2000/natori/index.html https://github.com/ioccc-src

Probably more of a hat tip to this one: https://www.ioccc.org/2000/natori/index.html https://www.ioccc.org/2000/natori/index.html https://github.com/ioccc-src/winner/blob/master/2000/natori/natori.c https://github.com/ioccc-src/winner/blob/master/2000/natori/... It's interesting how the same 2551443 bitmask appears in the time calculation for both.

repmop 1y ago
2551443 is the length of the synodic month in seconds. The calculation being done converts the current time in seconds into a 512-wide integer range representing the lunar phase by offsetting from the lunar phase during the unix epoch.