n!!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
254: | \[254!!!!!-1\] | 239641 × 634199 × 9492199 × 186521603832103782187644607404007857024462629873156516107905401237381782698205002583<84> |