n# - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
56: | \[263\#-1\] | 1176221 × 841626607 × 6174446933<10> × 710666640649906988076088519248216120759857077207166423280786759111721317898099079<81> |