4 hundred quadrillonth?

[Lawrence D'Oliveiro]

In message <7b986ef0-d118-4e0c-
afef-3c6385a4c6e6 at b7g2000pre.googlegroups.com>, rustom wrote:

> For a mathematician there are no inexact numbers; for a physicist no
> exact ones.

On the contrary, mathematics have worked out a precise theory of 
inexactness.

As for exactitude in physics, Gregory Chaitin among others has been trying 
to rework physics to get rid of real numbers altogether.