Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 399: | \[{28^{399}-1\over27}\] | 3 × 113 × 271 × 457 × 1597 × 90403 × 2913233 × 4422461 × 5641861 × 21084187 × 268442413 × 1345878073 × 62830837877749<14> × 223934956756993189<18> × 530795452578128557<18> × 5504044949138999959<19> × 4652032620781659567810280156291<31> × 4561624887977679848933162147577525605222422443335850057720652079444297664198848221051207376735096470015885732291219068991373<124> × [329743495062886234468701213741530399972962989034914736188308546593757411553512456244251657051817952430030799228241398662878091467844827393825073294043282819716459680012087010108493572353067026529435277373517233266638315983107603424691854425408065820780022590333214201650324381453305345759107621<294>] |