n!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 260: | \[260!!!-1\] | 321817 × 45268177 × 4354317109<10> × 392315617325713<15> × 4053959845122586960779552007998361242484669643531441433232074019<64> × 1124127247555046739958978696603441256039343201483179100137652199913160457<73> |