n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 250: | \[250!!+1\] | 251 × 2913037 × 1474111430137<13> × [7429768461552602247447278860161648862496352923588284389944642207113014546120679284258732769018426840499481948437113465192891486765903686310820566333517056410765947186481196922232347141530583459303071580077712241123315636236279<226>] |