Fano–Iskovskikh degree bound conjecture for canonical Gorenstein Fano threefolds

Let $V$ be a Fano threefold with canonical Gorenstein singularities.

Fano–Iskovskikh conjecture.

$$-K_V^3\le 72.$$

This conjecture refines the previously known explicit bound $-K_V^3\le 184$ for such Fano threefolds; the source presents the bound as the expected sharp improvement.