Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
63: | \[{19^{63}-1\over18}\] | 32 × 127 × 523 × 701 × 29989 × 70841 × 30640261 × 68443621 × 21095068697641<14> × 513907987925996378410396566096001<33> |