n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
166: | \[166!!-1\] | 151 × 167 × 15132159412788872910819983761442787952446675684680075352989150726821988180138049120708284374892388736452523951080682645469534644368481579886584447<146> |