Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
215: | \[{11^{215}-1\over10}\] | 5 × 431 × 3221 × 133680121 × 1416258521793067<16> × 6371112819065042612731<22> × 42534656091583268045915654719<29> × 22275205654083770417028084935798922976899120572042284298420545240515432736106103755728211134269317267361807149485908840747719671275337154455061<143> |