n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 315: | \[315!!!!!+1\] | 265090213900149427169049980640960496784272282621736169785458751<63> × 810874234519642687411271977518119653296617851750372896852494962978751<69> |