n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 167: | \[167!!+1\] | 2 × 1061 × 1567 × 6607 × 13751 × 87943 × 29148562478195462828173454005914416084925911170319551033242080549<65> × 5088284405246113878812507705881587112593168266085824646386253920701<67> |