n!!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 252: | \[252!!!!!-1\] | 438851792364847<15> × 4340372050273445580857<22> × 11923070153169128254288255990181<32> × 1289213749290092398935179874738053<34> |