maudits 0 Newbie Poster

hi everybody,
i need some help, I am stuck on a problem for too long.
I have a decimal number (big Int), very big, (246 cypher). I need to convert this number to a 96byte char.
I cannot understand how. I have already read and tried pack/unpack, but i can't find the good solution, maybe there isn't.
I need to do this cause a
tnx for any suggestion
regards
francesco