n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 171: | \[171!!-1\] | 2 × 619 × 618929 × 5761192133<10> × 408303870212247139425575941422031027225233148518620392354744543<63> × 63178344784342449411193191163474362575823179859444785635786485875185623973<74> |