n!!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
294: | \[294!!!!!-1\] | 1201 × 16561 × 164107519 × 439119433561<12> × 12990739500371<14> × 6547695254609657<16> × 74884833381121981120827555791780843124946399448031411089746980491<65> |