n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 210: | \[210!!-1\] | 3947 × 96821 × 1857956264490207209<19> × 44189776885285073507371789<26> × 1398107683063734625840070083932667290584057375804628290470864559359776935902599868820664056006704519416431168598800429459831457325411686668007294277<148> |