n!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 263: | \[263!!!+1\] | 2954437 × 10534291 × 240706200307<12> × 19465667138766967<17> × 357509111144662993<18> × 127277271352680985138297876745981<33> × 33343543994324299409740990574536011641<38> × 134809954139750374685972494384522059645159033479<48> |