n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 271: | \[271!!!!-1\] | 23 × 449 × 673 × 8184826619<10> × 165687609974174876270179937831083751382641<42> × 18701539898166738780882526742364540667910842107676166376013911950300513977820291<80> |