> Then just square k times and you get for a=12, a^(n-1)=1. 1 mod 65 I mean .. -- Matej Pfajfar St John's College, University of Cambridge, UK GPG Public Keys @ http://matejpfajfar.co.uk/keys WARNING: THIS E-MAIL ACCOUNT WILL BE DELETED ON 15/07/2002. PLEASE USE mp@cantab.net.