n!!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 266: | \[266!!!!!-1\] | 5 × 163 × 6857 × 17509 × 21529 × 21967793 × 26916704360869937309266693<26> × 92015477514996613797575154906283808426687916032507913621289<59> |