n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 136: | \[136!!-1\] | 139 × 5087 × 45029410725755149787069<23> × 1010095862864068773995166896009531819<37> × 22759473762868109720418738287838931885875106659980413<53> |