n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 247: | \[247!!!!-1\] | 22 × 7182836777365497412509061507046923<34> × 159972988540002213164120650646422389169<39> × 42283961030903640018770968853006202924314347635113<50> |