n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 551: | \[551!!!!!+1\] | 1321 × 2557 × 4219708483 × 173860679851<12> × 1423961943929887651<19> × 2524793555560475739809<22> × 4436465099741827209713017<25> × [86410841445869278968027002713348390008276920824235917937542651651255883966759260055856382737591978843656780837828745173642831473720180455649872649433705051068761959<164>] |