n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 276: | \[276!!!!-1\] | 139 × 840998981158940897229231199258365461491861422643394848868798751793<66> × 510077453679404707513381463235291937735765343103357056982058007269961837<72> |