n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 271: | \[271!!!!+1\] | 2 × 3354434957346887<16> × 2470338942053366477010812765659176491<37> × 3699323933410431988529873956541707253684461750071860537813035813394042690413079354489<85> |