n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 198: | \[198!!+1\] | 199 × 52813 × 2393680334770877<16> × 174006447776592329704428758417<30> × 57681213252713333480667890616719316471810054723130625777<56> × 2342682488920166197926842616400609866126270471085402931216301637131901699791311<79> |