n!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 247: | \[247!!!-1\] | 3 × 112927 × 12749226850429<14> × 7664544861018783079<19> × 3586939774880777412045168974113779731827<40> × 25979187421026997357421613388070866524465197576059166571472401055130977689957305108347<86> |