Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 240: | \[{13^{240}-1\over12}\] | 24 × 3 × 52 × 7 × 11 × 17 × 31 × 41 × 61 × 157 × 241 × 421 × 601 × 641 × 1009 × 2411 × 4441 × 4651 × 8161 × 14281 × 28393 × 29881 × 30941 × 161971 × 217561 × 28325071 × 407865361 × 460655521 × 815702161 × 1030309681 × 1453046401 × 2643964801 × 543124566401<12> × 659481276875569<15> × 56156144390197362704881<23> × 442779263234039928595359287744639041<36> × 298630427465034388053076938177326459297282487329761<51> |