n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 161: | \[161!!+1\] | 2 × 163 × 503 × 92872763 × 8663264458533308659006224622488847471618890484801331<52> × 6649656593820603550472407545076862196600483831322770707433476189480357553742189<79> |