Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 135: | \[{13^{135}-1\over12}\] | 33 × 61 × 181 × 2161 × 4651 × 30941 × 161971 × 203311 × 650971 × 1609669 × 57583418699431<14> × 2997534286720771645924621<25> × 364003636749512332994633571014911475374730785199054707304764450331867311<72> |