No two card shuffles will EVER be the same.

[lumberjim]

Originally Posted by Flint

The 40-hour week is something familiar to us;

that's less than 1/3 of the hours in a week....what do you do with all of that free time? ya know....it sounds appealing....

[Spexxvet]

This site disagrees

My interest with perfect shuffling started with a simple observation that the standard poker deck containing 52 cards will come back to its or original order if riffle shuffled precisely interleaving the two 26 haves 8 times.

So on the ninth time, the shuffle will be the same as the first shuffle.

He expects a "perfect riffle shuffle", though.