n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
270: | \[270!!!!+1\] | 13249 × 6268279 × 177655302960604685204622048667237996015803795672779098928060170991588999788812932002826599703622518691423517571650997749799431<126> |