n!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
245: | \[245!!!-1\] | 3 × 4609173643<10> × 7763233355359644333761479861721935691676554233624937853014154863881387216033282128824266371029105718646045151982209021780758420750580909751447464252831<151> |