n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
225: | \[225!!!!+1\] | 2 × 537703150307784111827599783489<30> × 10389340225411563866931891135624061358724318420336587901152261160489652434159017<80> |