Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 238: | \[{13^{238}-1\over12}\] | 2 × 72 × 29 × 103 × 239 × 443 × 22079 × 5229043 × 13883731 × 172597045223<12> × 2534279978077<13> × 2810860561573<13> × 15798461357509<14> × 617886851384381281<18> × 1251321793446942324872434004484031<34> × 4612374082571233571173485783879425298299100059023528948849979973541<67> × 318142248276268225390575806767124136220864690474616883094277115023593<69> |