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Nice challenge! Finally solved it when I re-visited here after some months.. As everyone is saying it is about serial signal and we have a prime number, so at the beginning I though it is some asynchronous signal, and I thought: what if it spells out "The answer is...." as in the other puz...

dangermouse wrote:After trying all possible ciphers (e.g it's not an Enigma cipher), i noticed that people living in the US have an advantage on this challenge

Thank you for the hints!

I read your hint and then I got an idea when I view the challenge page again

I think this can be refined, but I'm stopping here

echo -e -n "`find ./ -name *.txt | sort | xargs ls -l | awk '{print $5}' | xargs printf "\\\\\x%x"`" > answer.png