Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 289: | \[{13^{289}-1\over12}\] | 103 × 443 × 32369 × 13574909 × 14949971 × 15798461357509<14> × 15247192659241717920658977891083<32> × [9815114712466970023948211997279316462561612221061395216473173810815837467486345920671165338326245029831564873095596739006869550585733327499126926271811784451767573252247716878303904249998598208869342771523320038188738304101771487802619793784331638967557<253>] |