n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
175: | \[175!!+1\] | 2 × 1468440323263<13> × 176297975516720411<18> × 19586809535909520990587<23> × 339947933043794150272146555321716679854543357372549757484084192539718169984368861692958934815320080627470943<108> |