n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 207: | \[207!!!!-1\] | 23 × 14951 × 175003 × 2399698141 × 4607063944078069719535712970619<31> × 2144445500534119596839690376231765101536019391119<49> |