[longshadow]

but I would rate the Riemann Hypothesis as the most important math problem. The ABC conjecture is a close second.

Sheesh; doesn't the Continuum Hypothesis get any respect anymore?

[Doctor Stochastic]

The Continuum Hypothesis seems to have been settled by Cohen in 1964 or so. It's consistent with set theory; it's negation is also consistent with set theory. (Zerlemo-Frankel set theory anyway.)

I do not think the Riemann Hypothesis falls into the class of things that can be taken either way.