n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 209: | \[209!!!!-1\] | 23 × 5927 × 10184339138227<14> × 292580925271788493716606837242395349<36> × 34406669832797459013324163284169020521637596743<47> |