Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 189: | \[{15^{189}-1\over14}\] | 7 × 43 × 109 × 127 × 241 × 541 × 883 × 2647 × 21061 × 123229 × 399043 × 1743463 × 16354441 × 829049498029<12> × 1470374630929<13> × 2817034275427<13> × 269297040407347<15> × 15105332280488398974794287<26> × 19944576115520464846832773603324107169<38> × 13066129040138332937552963634251565937097327408254876994777161<62> |