[boost] big_integer numeric error

From: Joel Young (jdy_at_[hidden])
Date: 2004-05-13 12:17:29

I believe there is a numeric error in big_integer.  I am working
to isolate it to a single operation.

I can find the error now because the library is fast enough to
run one of my sims.  I get a different value when running with

rational<big_integer>

then with any of these choices (which give identical results)

rational<long long>
rational<big_integer (cln)>
rational<big_integer (gmp)>
cln::cl_RA

Not that it is much use but the wrong answers are:

Inonsistent Value:
38485535445/562949953421312
 6375930541/562949953421312

Consistent Value:
42780502741/562949953421312
10670897837/562949953421312

Again, I'll try to narrow down the exact point where things go
wrong but it might take a while.

Joel