Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
70: | \[{15^{70}-1\over14}\] | 24 × 7 × 11 × 31 × 71 × 1531 × 4931 × 1743463 × 4167731 × 10678711 × 497638891 × 36083117529286469251<20> × 53096945644422356461<20> |