Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
40: | \[{19^{40}-1\over18}\] | 24 × 52 × 11 × 17 × 41 × 151 × 181 × 911 × 2251 × 3833 × 478382041 × 14706033761<11> × 16936647121<11> |