n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
216: | \[216!!!!+1\] | 14009 × 3324924708486529<16> × 1608305705865997447551386950777647457698103368109704809939361211016753720989702456841<85> |