n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 180: | \[180!!-1\] | 179 × 9473 × 324299 × 846499 × 18855186164172566693160950559318926197<38> × 209552066446155781633498045690418266251854045779144999067305160064689056348762732644172619477771051650794829201<111> |