n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 219: | \[219!!+1\] | 22 × 331 × 111136365031<12> × 7467130735995461<16> × 1008217998078284581455439549484891104800853553104861331985871286040832033070422582739345350901862873155619476805989926876621150678283657470786189625054074994807190889514178434662739<181> |