n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
139: | \[139!!+1\] | 22 × 2251 × 15441445635112935362819476167184784863<38> × 6846708111793144275174922770956266663000259174867215937793443246649787820262763<79> |