n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
225: | \[225!!!!-1\] | 24 × 13768848943<11> × 50715758738707641578094116415800035435975104210588543468603960570165549918767048664997011614336723<98> |