n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 241: | \[241!!+1\] | 2 × 16649 × 69422501 × 3846417948001715057<19> × [12399881774993915128201784177390009913359620661261346682304563056966325489829287868484934517953906291509124018616172759325920202217715438899846062729037685052402314543478519637125539786158413532236681348741<206>] |