Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
221: | \[{10^{221}-1\over9}\] | 53 × 79 × 443 × 2071723 × 265371653 × 5363222357<10> × 1661422610776235605151630089<28> × 1222809112881054957482333784778500947505125605556339705344373826182388226051058385373807501056554769983252193191880010181453051182310767800176057994138047394190733<163> |