Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 206: | \[{13^{206}-1\over12}\] | 2 × 7 × 619 × 5563 × 89611 × 1450447 × 89433871 × 9577825183<10> × 592045971390131<15> × 299872566772439874463<21> × 147258804290600290058437<24> × 1493185475735966076741431<25> × 620218456783781896239160280840458760079381054015521507<54> × 19026442010188172700578868793469892827183847475034770559<56> |