n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 319: | \[319!!+1\] | 2 × 1019 × 124147 × 287191 × 13409531 × 226988779 × 178347547453<12> × 3005195780963390366537<22> × 124362838890575793414167<24> × 29010897066856717001498981<26> × [71805947559918464151004901422721852721239250086397030087034644408910771376919319622532465027262628994080558383739022219829550878454062614939980029517626632610946975254569909549123809306622452375126858384001316489436960017<221>] |