n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
191: | \[191!!-1\] | 26 × 349 × 10169 × 184231 × 8005411 × 5191314841<10> × 14651355447247<14> × 16815976808538097943<20> × 251143163305671520952174537<27> × 41989970691188341410887943668139673992281372308791508410090958900074436583773593595603003<89> |