Ruby, 45
Code
%()[]./ 0123456789_abcdefghijklmnopqrstuvwxyz
Output
9410663329978946297999932
Original Code
p %q[zyfnhvjkwudebgmacsxrl].to_i(36)/51074892
See charredUtensil's hack attempt in the comments for a great explanation. And yes, I generated the code randomly. I hoped the "pangram" approach would paralyze people with the number of options.