n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 265: | \[265!!!!!+1\] | 107 × 808833881419999<15> × 1975283736859181294856666276354638380409<40> × 277627121751951155592260742889660546681651855583173<51> |