n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 189: | \[189!!!!+1\] | 2 × 389 × 2963 × 476235593658079029584267<24> × 13523639230554752040921000767215281498353124122347924988077<59> |