Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 170: | \[{15^{170}-1\over14}\] | 24 × 11 × 31 × 137 × 443 × 1531 × 2551 × 4931 × 1045002649 × 6734509609<10> × 13695697627231<14> × 101462866544971<15> × 56829536443149107315991803743105617127860919020829030897561<59> × 1737312434693929309175606904667659697444924171560401053012526469801639759361<76> |