Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 663: | \[{10^{663}-1\over9}\] | 3 × 37 × 53 × 79 × 443 × 613 × 210631 × 2071723 × 52986961 × 265371653 × 5363222357<10> × 13168164561429877<17> × 900900900900990990990991<24> × 1661422610776235605151630089<28> × 124096743448950347413897885639<30> × 6600431588546691579150539556898987<34> × 117376474464009222292643537185767152422369<42> × 1222809112881054957482333784778500947505125605556339705344373826182388226051058385373807501056554769983252193191880010181453051182310767800176057994138047394190733<163> × 11545405714824105166014009282020136346600989062506567537970423445967860733822402409112063867882018373279340333925838207325943260624470629656155225941451173465625374559522950858668100853071372956869376624168308990525654861862001284423448061047680514534023302316279273278513789395883<281> |