Is it effectively computable? (Revealing how little I know about coding theory...) --Michael Kleber kleber@brandeis.edu Me: yes, there are iterative constructions that will get close to that value. even an old-fashioned BCH code with those parameters will correct 100000/log_2(2^20) = 5000 errors. i'll send this off before TKR/Cablevision kills my connection yet again.