n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 285: | \[285!!!!-1\] | 24 × 11019786016329821<17> × 71693793730648819<17> × 283659338948455310187481<24> × 92956727858778491810260129<26> × 45657912346444942098567974729198536625354466510889111933457839<62> |