n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 215: | \[215!!!!-1\] | 22 × 251 × 63649 × 515274797419<12> × 27312884689520878435030784085967719913<38> × 25031722522506213630600814150113229919009020927<47> |