n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 126: | \[126!!-1\] | 17483147836061<14> × 1045940597643371878989470670741096629098041695181445726063048200778142682369343958923585168459<94> |