n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 203: | \[203!!!!-1\] | 2 × 246206097655539962313712177506208357717640567<45> × 4868581505664026173375453947151458285545464018367861<52> |