n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 197: | \[197!!-1\] | 2 × 199 × 20287 × 1193081302195609813850881<25> × 65621063477024770828459584661<29> × 52992954985304906046069386094334642065771291532433378773613153933740879822559964989529973183703852787002621826231886848094339<125> |