n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 274: | \[274!!!!-1\] | 397 × 363947497 × 40444625191<11> × 1240720217756088319632258873737564297<37> × 557565943815615265612098127403450109050838431792016278370071397218020043708550493<81> |