n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 254: | \[254!!!!-1\] | 200096604413<12> × 394812841713743<15> × 87862611741442528113301<23> × 437832603630052450747833630503504767539261032310063969883746710208605853702161<78> |