n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 304: | \[304!!!!+1\] | 811 × 91807 × 4486639 × 33502408286881711<17> × 2272196395499099628343725054311<31> × 8993782933212945270801626408401481797<37> × 47065490028337032686736659466453818757827576125137163032191<59> |