The following list is not up to date: * rounding needs a new definiton: rounding to nearest fraction (see Knuth and fixed-slash fractions) * bmod(), bmodpow(), bmodinv() not fully/properly implemented yet * bsqrt() is also not quite optimal yet * BigRat does not handle modify() yet or in a very incomplete manner Quite some stuff needs still to be done. Please send me test-reports, your experiences with this and your ideas - I love to hear about my work! Tels