On the conversion of Primes between various Representations

I wrote a program called dec2bin. It takes on stdin a decimal integer, and produces on stdout the binary representation of said number. If you fetch the 1401-digit prime number on Chris Caldwell's page , reformat it to a single line, compile dec2bin with

cc dec2bin.c -o dec2bin

and then run

% ./dec2bin < prime.txt | gunzip

you will receive for your trouble a part of the source code for css-descramble.c.

Why is this important? Visit Dave Touretzky's Gallery of CSS descramblers for more info.