Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 475: | \[{28^{475}-1\over27}\] | 1901 × 14251 × 15101 × 106801 × 637421 × 21084187 × 342484501 × 6813064001<10> × 7984305701<10> × 5504044949138999959<19> × 18876519380766175812534662561<29> × 8010545589178234338619518726411686560584870675847476297867777517585821214661<76> × [10219340708062168773576537505782253158759246927088618002732689634457503713369839113806028016062152685954941555423045344725545851619947312976629839065558215881971100634212358873282020424959786350666638156615070773499065564090946964369417811730623569107662651098595979575584906954981040719335040535368841115666600483977752019776304002145993864528866956278467958969962948250950369984302663120019462645736756386462866309054534678482948455101762433983425220350026750485478179586373477205452875726971685669862451<506>] |