n!!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
218: | \[218!!!!!-1\] | 5 × 44941021071275789<17> × 110923159705944821<18> × 1836431204644048561<19> × 48658010408335190897609261681107<32> |