n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
258: | \[258!!!!+1\] | 229 × 5717 × 4303289 × 94465442432204366683499<23> × 29198837417695420448399102421553843286498681<44> × 50456856643124434199406936991338016066962936774427<50> |