n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 120: | \[120!!-1\] | 673 × 64189 × 7207179779482901<16> × 30812969899479032071721611639872341079991759970092696680704534387720811131167<77> |