n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 129: | \[129!!+1\] | 2 × 131 × 130189334367688303721653<24> × 623069490828327213708355053036131602811814510158713496450078758892947397534043399391<84> |