Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 646: | \[{13^{646}-1\over12}\] | 2 × 7 × 103 × 443 × 647 × 1287479 × 2039423 × 12865927 × 20250163 × 80498707 × 1901743897 × 2107218409 × 9468940004449<13> × 15798461357509<14> × 1260152469899447<16> × 617886851384381281<18> × 104422877883960436477<21> × 248448489387018609181<21> × 8052014104462879077748211<25> × [21536763152801171854580463037656748624626073366259838881555232508621642598145235270302183378466352357723305531157620181128286651496962985099837875384548967036956257326619178046771522796014857794816917899426736307126601568443277066219383673388283246587463<254>] × [706022160819220557056494421430698997833464300520920953631380038990160422784688036197414741625848077473327050980035588710772354721628772108672012469605817021530718841091975301013438885340781432650843182600988405475420567487000702449285766241228950500509341656234397999170792474753<279>] |