n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 289: | \[289!!+1\] | 2 × 2837 × 655451517797<12> × 8638177100911195499<19> × 502846533907590869741<21> × [104018970390401949857279921680627433799766369865002923552550919637619871813289617860082463509892634663677607576557928328299229040080506210625987264995523158077179898555750151900965814530708025719638932713359829940373183975796682940074664663<240>] |