n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 135: | \[135!!-1\] | 23 × 2381 × 81047 × 2600046794057<13> × 12453814674668432894448603111704157736768996343674703756971657832622536131186007290821917684447<95> |