Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 247: | \[{13^{247}-1\over12}\] | 53 × 1483 × 4447 × 6917 × 264031 × 1803647 × 12865927 × 33786637 × 5898195459469<13> × 9468940004449<13> × 1644445565188037<16> × 408189660586084149333723969054793014325764402326782124910797220743815799771587452032478319<90> × 618771507742258775366473692972132219692788702409680206332068085521346010388906443755768680888015129916707<105> |