n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
237: | \[237!!!!-1\] | 23 × 349 × 9261023 × 5464191581088566982423429959703986017747008487373651007230736340401085980042199000700507076585177560718989<106> |