n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 115: | \[115!!+1\] | 22 × 102539 × 421176341627<12> × 26025486832799801261<20> × 11139726690138666603276021197218530488063027026152340822193<59> |