n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 219: | \[219!!!!-1\] | 2 × 12659 × 8014531046360913623<19> × 225345983083891277347<21> × 107822473063565993106605597534829315950710940983525443130942153<63> |