n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 226: | \[226!!+1\] | 7532771 × 206411347 × 7298752481<10> × 65271251351<11> × 815362276893407<15> × 5602519027539516191<19> × 5995324014209750585243<22> × 6069352291789253319524473394377<31> × 190612298311125583209795282151976993654792321<45> × 9872515256478320749280285410832604336480339681026789<52> |