n!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 220: | \[220!!!-1\] | 3 × 1627 × 40048531 × 471426314641<12> × 800658875679493<15> × 1442797950067062726619062523903<31> × 13322669177186083035098531174509561419311586137853221295026228854552087231<74> |