Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 685: | \[{5^{685}-1\over4}\] | 11 × 71 × 20551 × 603349 × 48102071 × 18025611971<11> × 121719631478506669<18> × 7851027307722624763151<22> × 497478532938871159260123601<27> × 535569744943399716958855013333971<33> × 5276583832843396532095802023230871<34> × 251755028858658462627642052961230751431<39> × 1056664240671504816947479204045440388475071602248489506201<58> × 10797527159124612172312100252863287238191451112940868281174760219892107771<74> × 480636541789372639845443995029959385462880077616430446583016429115077098281605378791952505330926736543135246505860481444101426097841648216027551141<147> |