n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 248: | \[248!!!!-1\] | 353 × 673 × 45833 × 1318879 × 14396018807<11> × 124244029764461<15> × 26057028870828537068795275731242597361628563007216600460316158619322471530213534539<83> |