Three irrational numbers: Pi to One billion Digits, Square Root of two to One Million Digits, and the Number E to One Million Digits.
Irrational Numbers on Wikipedia:
http://en.wikipedia.org/wiki/Irrational_numbers
http://en.wikipedia.org/wiki/Pi
http://en.wikipedia.org/wiki/Square_root_of_two
http://en.wikipedia.org/wiki/E_(mathematical_constant)