The trouble with the integers is that we have examined only the small ones. Maybe all the exciting stuff happens at really big numbers, ones we can't get our hands on or even begin to think about in any very definite way. So maybe all the action is really inaccessible and we're just fiddling around. Our brains have evolved to get us out of the rain, find where the berries are, and keep us from getting killed. Our brains did not evolve to help us grasp really large numbers or to look a things in a hundred thousand dimensions. --Ron Graham, from preface of Wonders of Numbers: Adventures in Mathematics, Mind and Meaning" by Clifford Pickover, Oxford Univ Pr 2000, ISBN: 0195133420