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> × [572116634139888116861553920250128521570037686032114625386698259190253124293062583336036079852544972359673003025242259<117>] |