Pi hexadecimal calculator

This app can calculate Pi in hexadecimal format. (Based on 16 and uses the digits 0-9,A-F)

The calculation is based on the equation:

Pi = SUM[k=0..inf] ( (1 / 16^k) ( 4 / (8k+1) - 2 / (8k+4) - 1 / (8k+5) - 1 / (8k+6) ) )

(published by Bailey, Borwein, Plouffe, 1997)

It is noticable about that formula that it not only can calculate Pi in hexadecimal, but you can also retrieve any digit from Pi without calculating all previous.

What do you think is the 1000000th digit of Pi ?

The results can be stored as text file.