n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 106: | \[106!!+1\] | 107 × 113 × 467 × 557 × 5209 × 651143 × 18616217749<11> × 193890955742869985817692150326126747424499811645541904863<57> |