Miscellaneous geekery

Every well-shuffled deck of cards is in a unique order

The number of possible permutations for card order in a standard deck of playing cards, 52! (52 factorial, or 52x51x50x49 . . . all the way down to x1), is staggeringly large. How large?

Yannay Khaikin, who created this lovely video explaining the concept, says it’s this large:

Any time you pick up a well shuffled deck, you are almost certainly holding an arrangement of cards that has never before existed and might not exist again.

Seeing this mathematical concept explained through cards is one of the coolest things I’ve encountered all week.

Out now: The Unlucky Isles

The Unlucky Isles [affiliate link], the first system-neutral guidebook for my Godsbarrow fantasy campaign setting, is now on DriveThruRPG.