#
#  OK.  So I wouldn't exactly call this 'bad'...
#
#  I'm not sure, yet, what to do with ~0.  Should it:
#
#    1.  Negate the entire large number (all multi-
#        precision digits)?
#
#    2.  Only negate the least significant digit?
#        (this is currently what ln2 does).
#
not 0 4294967295