n!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 268: | \[268!!!+1\] | 6818309021<10> × 26822775751<11> × 571011887589631<15> × 186504108363687461003<21> × 34425242796753021094269440962141891<35> × 2774559143122022998208683247056755017<37> × 129400567388338512472151824096683959277434174134896661<54> |