n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 125: | \[125!!!!+1\] | 2 × 179 × 25385176188116988537743<23> × 10917145059275298332529226229<29> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 125: | \[125!!!!+1\] | 2 × 179 × 25385176188116988537743<23> × 10917145059275298332529226229<29> |