n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 258: | \[258!!+1\] | 157 × 1399 × 25057 × 202324536691<12> × 167223806171399<15> × [181813507789471272871858441170093562137256234723766640961221940162264024669281208906895790135747005711060051223349186025831085892707028725627754406154023851827608567531307185829426427574627078234010331921561385151633162839<222>] |