n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
228: | \[228!!!!!+1\] | 5 × 347 × 131783 × 354854867 × 830941107463<12> × 863533990749959<15> × 883414572930831513017<21> × 2201810897085750061855507<25> |