n# + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
64: | \[311\#+1\] | 60722339 × 57620579376482127166154112047<29> × 55770783420882459331720050195290513239300158794437698498140828448291956894457840528793087<89> |