Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 129: | \[{13^{129}-1\over12}\] | 3 × 61 × 6451 × 119627 × 7180925126477041<16> × 43466212635494347<17> × 552781743698966779174737704265497702530829<42> × 1708905187270614165827914326920860217053103683566606076777<58> |