n!/n# + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
57: | \[80!/80\#+1\] | 67 × 2017027 × 52835787076628319510299951993644993<35> × 3115121075458096194509932134736177058980633273<46> |