n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 124: | \[124!!+1\] | 97 × 223829 × 9996951041112419<16> × 69424327916657731466987<23> × 9631385522975224310528074085973563566906762478126776344509<58> |