MelatoninSeven standard "riffle" shuffles are needed to effectively randomize a 52-card deck.
CountVonAfter thoroughly shuffling, the exact order of the deck is one of 52! (52 factorial, or 52 * 51 * 50 * … * 2 * 1) possible combinations. That is such a large number that it’s possible, even likely, that the exact ordering of your deck has never existed before and will never exist again.
True, but due to the Birthday Paradox, the chance of any two people shuffling a the same way at some point is a lot higher than you might think.
No… You still need 5.5e67 people to get a 50% chance that some has the same random shuffle as you
