n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 204: | \[204!!!!-1\] | 61 × 162396601 × 18537888907<11> × 3686267626905221089057<22> × 11618517024654667116785237194744485130947593711571285641<56> |