n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 171: | \[171!!+1\] | 22 × 12870696841<11> × 148346675119086467<18> × [14910276823301424549385372458304424375661983009132923210439499849385446031856659004508243895199061767313804913958016330674373677<128>] |