n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
127: | \[127!!+1\] | 2 × 741001 × 415806637 × 2016030913404698339388764983<28> × 132612993815665230132321818920897398160822613183190640566226269803<66> |