Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 645: | \[{7^{645}-1\over6}\] | 3 × 19 × 31 × 1291 × 2801 × 10837 × 31391 × 159871 × 822161 × 63350976270733<14> × 166003607842448777<18> × 2192537062271178641<19> × 11300176322829911971<20> × 147795410845880963171<21> × 1579416102779641258861<22> × 175446584281395198837259<24> × 694623197348682715265952229891<30> × 11916717598664539151308306888803765941891<41> × 15808291449184578466328984491788528176755903275531421<53> × [51188402453232129896114166200628426096197297950835250677314386608792587278902828514121920189336741844827794309098835198260580978960402546254382399072717747204661434056319241404527287562547227073943448712523350497159164820788712954112900163261979679439927070351<260>] |