n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 264: | \[264!!!!-1\] | 103 × 283 × 6781 × 9479 × 22120151 × 159797243 × 7498556425981<13> × 59678604063501050709580509406758028289489073827150095388639426321226127748721788159965951753<92> |