n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 268: | \[268!!!!+1\] | 15076879 × 121810270293961766707307040292219<33> × 135685226812236652162452049974377<33> × 3187428782159910462840296192782075808923956858315192301315601813<64> |