n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
287: | \[287!!!!+1\] | 2 × 1721 × 4013 × 1810835041399<13> × 15274766902061129730079543800574528746608033823286984294924992844742453591319653942078173622464988094845992534243834070965664819<128> |