n! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
65: | \[65!-1\] | 67 × 43411 × 10131127 × 138983473 × 3892024936038887<16> × 517438962621432871051139647031280823783520905591974151<54> |