n!/n# - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
53: | \[75!/75\#-1\] | 22637 × 930903890023<12> × 17185102872379163<17> × 199665773948971801<18> × 8424055929568854871177253933423<31> |