n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 227: | \[227!!+1\] | 22 × 115891 × 4104187 × 3011636413 × 3071638582440241019<19> × 158434001333804718059119927786682603383138142606648939712209764072153493304622660141391901187997967167135668107297764060855333178162545746956019815441047605502505800478131429110631<180> |