Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 121: | \[{13^{121}-1\over12}\] | 23 × 419 × 859 × 18041 × 4911149 × 4161245903 × 1368405847627633<16> × 12222142455214504546059307061481052743675873813323465482112831346038181859632766076231652317<92> |