n!/n# - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
55: | \[77!/77\#-1\] | 83 × 82703418318593<14> × 306868286717819<15> × 2043598079094463448912989<25> × 828048910477578269724142317931<30> |