Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 187: | \[{13^{187}-1\over12}\] | 23 × 103 × 419 × 443 × 859 × 18041 × 28123679 × 15798461357509<14> × 445536601753454704112226421<27> × 1253772507557416227185554718637321919458554056492076984268166292125421627866654697595206614037538229843773930642076039582197050168560818397975619<145> |