n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 188: | \[188!!-1\] | 191 × 349 × 660631259191<12> × 438299072287450463<18> × 90539938919833616445098039073851<32> × 1232442714965680195981577256153058411870528797947151313725246061687278556350610658081611979856248831003829367<109> |