Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 97: | \[{13^{97}-1\over12}\] | 389 × 971 × 93964390627<11> × 2649670037989481306648479727588559059666394088223938940478532104361128850279248331066898797<91> |