I love this! I can't believe I've been a math person basically forever and this is the first time I've heard this.

old.* URL and without the ?rdt tracking, whatever that is:

https://old.reddit.com/r/ExplainTheJoke/comments/1czson4/eve...

Wouldn't 64 in base64 be represented as = ? (and not 10). Love the comic!

See also: https://www.gnu.org/fun/jokes/10-kinds-of-people.html