Any advice on Modulo 7 math efficient conversions? I have a table filled wi= th 21 digits of base 7 digits and need to process in 64 bit integer math. Thanks for any help. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .