n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 273: | \[273!!!!+1\] | 2 × 1847 × [185712369128419990998898200658626078966272458038277234836697286228489086145914457553199358717846096643336187975539378497296741735502779<135>] |