n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 348: | \[348!!!!!+1\] | 52 × 1496773689079672655249791<25> × 1701231766733032758814493649405442511<37> × 18267669015388798989061664278594140649<38> × 10691249016163822964856835011167429792142792558737<50> |