n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 205: | \[205!!!!-1\] | 23 × 3633337 × 28412737603<11> × 28163808387906155034176873638573490295568542055063789772316674934037176450350623<80> |