n! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
91: | \[91!-1\] | 32711166360407<14> × 88902066312168844499<20> × 419790526928647246447760544140764445623<39> × 110748196700339762345764483973551413402430622940507232094237288143541<69> |