n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
296: | \[296!!!!+1\] | 24768282175237519699829<23> × 68444549099658223576037<23> × 69623373952216506982454966919864079057911493911029897469650277500535164032841937660045512174975008528355737<107> |