Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 685: | \[{3^{685}-1\over2}\] | 112 × 4933 × 1422061 × 5507401 × 217629707 × 26636505319811<14> × 661718838635930238791<21> × 15761953912526059950422004668720291591<38> × 108081809773839995188256800499141543684393035450350551<54> × 11016318749871852760322316258453817392697880515688272378036257133032902773065699182945267971382121192119504264040784673046435187857254121785484732781605576998361118366508898671<176> |