n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
249: | \[249!!!!-1\] | 22 × 421 × 566266531 × 871867528679629334301760670075807593953276719<45> × 2498442072163787061902849429437222228169773049326129655240370754549<67> |