n! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
80: | \[80!-1\] | 1270747 × 34037981588441<14> × 107696815311379729531745838349<30> × 15363917602600077879942822229603346336211620621835599861236045679883913<71> |