This is nothing to do with integers: 1e18 and 11 are doubles here. It is a result of rounding error: 1e18/11 is not representable accurately, and this should have been a warning to you that your calculations were unreasonable.
The C code is double myfmod(double x1, double x2) { double q = x1 / x2; return x1 - floor(q) * x2; } We can improve the answer, but what you are doing is fundamentally flawed and it is hard to detect whether rounding error has affected this. A warning rather than an error seems appropriate. If you really want to do things like this, try the gmp package (which seems to give the wrong answer here) or a more appropriate calculator. On Thu, 9 Dec 2004 [EMAIL PROTECTED] wrote: > R Developers, > > 1000000000000000000 %% 11 > [1] -32 > > I now understand that integers cannot be larger than > .Machine$integer.max, but because the above produces a result than is > patently wrong instead of an error, I'm reporting this as a bug. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel