n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 177: | \[177!!+1\] | 2 × 179 × 3949661563 × 341065482631<12> × 20674213722055196984443320986277364896519050923<47> × 61203084930691601911379470517049597074078350303077032153699366896702057033992523011828654613<92> |