> Completely impossible to take advantage of That depends on your goals, to do geeky things it's pretty cool :). I know my birth date (in the "ddmmyy" format)

> Completely impossible to take advantage of That depends on your goals, to do geeky things it's pretty cool :). I know my birth date (in the "ddmmyy" format) appears at the 262768th decimal of π. By the way this example validates part of the answer of sillysaurus2 to mvleming: I need 6 digits to encode 6 other. Not that good a compression.