Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 58: | \[{13^{58}-1\over12}\] | 2 × 7 × 59 × 1741 × 1973 × 2843 × 3539 × 8546789918171<13> × 16397414286709<14> × 846041103974872866961<21> |