n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 172: | \[172!!-1\] | 92204037229587733161249034793318104715637451644181<50> × 20329703226792600844605177591567880804826449258094282318728328981002051653709587538510283275976774137443779<107> |