n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
105: | \[105!!-1\] | 24 × 107 × 28219 × 10990367 × 3304902689017<13> × 2546646375821519<16> × 666180631212411830333152349848788563666263<42> |