n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 209: | \[209!!-1\] | 25 × 211 × 313 × 2321281 × [491749038082913977295983912658833886131430816151421017120126748002617100167199137496645117074938060143042566796848438258515743415769038714449542421631006043500498934519883104922034108879<186>] |