n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
144: | \[144!!+1\] | 73 × 101 × 1697 × 2179 × 4951 × 12452314243<11> × 778964171817093739<18> × 43065291001882672490549<23> × 5128429561058928292721974174989457049212580718116287074727613<61> |