Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 556: | \[{3^{556}-1\over2}\] | 23 × 5 × 557 × 1669 × 1107553 × 5430731 × 26436515641<11> × 8207398122145081<16> × 1113626506203380968993<22> × 17735794220172313692220944999595159<35> × 13857905391453292485606236633776204574597<41> × 115215201111546538317696820901417129607616709798043944747<57> × 6217073567621646188942987882827287720857305423132773876341378217457<67> |