n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 191: | \[191!!!!-1\] | 25 × 6871 × 12377 × 108357767964711837379053199233997<33> × 1032053358145153369693936081187268686667063893993<49> |