Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 180: | \[{13^{180}-1\over12}\] | 22 × 32 × 52 × 7 × 11 × 17 × 19 × 31 × 37 × 61 × 157 × 181 × 271 × 421 × 601 × 641 × 937 × 2251 × 2411 × 4651 × 12601 × 28393 × 30941 × 161971 × 428041 × 1471069 × 1609669 × 28325071 × 460655521 × 1453046401 × 14513462249341141<17> × 19145097390154976011<20> × 2997534286720771645924621<25> × 20300651374434580451862189685540688221<38> |