n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 211: | \[211!!!!+1\] | 22 × 73 × 56167 × 23998377065945437544893083092319335331558611<44> × 266034581681647234768175726900093135049446287819919<51> |