n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
142: | \[142!!-1\] | 12979 × 17783 × 8700552173124575212354558899073926105958684650134740923201499119839370745124280211235037690163336993307199444942307<115> |