n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[91!!-1\] | 2 × 310679519749332624899<21> × 57162898657065444245603<23> × 904396040551150334296424221<27> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 91: | \[91!!-1\] | 2 × 310679519749332624899<21> × 57162898657065444245603<23> × 904396040551150334296424221<27> |