n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 245: | \[245!!!!-1\] | 22 × 84701 × 175446461720251<15> × 140342845686503088408551403312500361326207115410268991172357527326509576085001840649500519521979006081<102> |