n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 306: | \[306!!+1\] | 307 × 7109 × 58543 × 18329369 × 1004667842318071<16> × 63847611928917246919885601<26> × 15249590304619296924858008365393909448795443840526327892968102241276359437973843764644325698429708495100112783611456352374693529582514923047643642303114287048512220563034314339973155814529749392016321502094576050682964890702822691095483979933268110113188111<257> |