n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 141: | \[141!!-1\] | 2 × 1075086704859174531929717114236102423392207852740793745245629<61> × 62423897726471291815009268747473581122121507655105005095298203<62> |