n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 148: | \[148!!+1\] | 151 × 331 × 2389930292598425191<19> × 4426246635699657173765978641<28> × 7024491413595594377021657256797<31> × 1682400811242078729040032536983446232814069890703<49> |