[jfoutz]

even if you're preserving blocks of 3, 17! is a big number. it's not 10^44, but still, 10^14 is pretty big.

[grandalf]

How many amateurish shuffles would it take to randomize a deck?

[tel]

It's a 10 letter password in [a-z]. 8 letter in [A-Za-z]. It's 47 fair coin flips.

[gaius]

I do use the cards metaphor for passwords: http://github.com/gaiustech/MkPasswd

[Retric]

Or 1 deck per day for 7 billion people for 40 years.