n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 294: | \[294!!!!+1\] | 163781 × 1426717 × [33072274825455112419009158081683542778958289934764877500300620005290142180010720723700074591026356813040636060263881675570195762257959220913<140>] |