Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 585: | \[{21^{585}-1\over20}\] | 5 × 79 × 131 × 211 × 463 × 547 × 1171 × 3511 × 9391 × 18181 × 40841 × 189437 × 443431 × 634141 × 41489011 × 57815101 × 61045219 × 85775383 × 516094151 × 22554946693833031<17> × 702978785993374112119171<24> × 80459337199345300130638393<26> × 479667952955520596219571126379<30> × 47999819885150422820855221255204479443163906801765079421<56> × 5409410795213092497224719423678323088390021822753211482321<58> × 12801249738878817126188071191894856280718343847929106839732904881739093191476709420994139418551374413291<104> × [282870148390408197779688784371977232556061029705796367712006316475957364827044039126290273129016858753258570773638857840633594373094828823169132541266859870716530803739081511579608661239486534403789052778079374513326274241573886965463016826253726489205466401411780394664322044995136407019244966487934783243761232872617448387175200603302385678443843296329447751845807230131<372>] |