n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
108: | \[108!!-1\] | 211 × 52861 × 592367 × 184020253 × 10889766779<11> × 130757621663<12> × 9883220770500113<16> × 243040913802681366330848984519<30> |