Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 409: | \[{23^{409}-1\over22}\] | 1637 × 28631 × 3195109 × 25641141228379<14> × 182157544745543<15> × 736337934288851<15> × 974561950436923<15> × 629075827444649671<18> × 4968118698126733687<19> × [2562862306450968117746998093839607995185312876439083063693496662002513933385281971517975690279144703273943575117052599078511738614324241261852994300323052152359887305770660365708899356064029401991819007174141987803234449070186222629019925583470689356968773470105601806482258380797932245387504550136038021131153509448601955156700868415763544928894469820318339188779576037815522847803609919786761531579035981970208458796970800634313106088250637022571<448>] |