Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 380: | \[{18^{380}-1\over17}\] | 53 × 11 × 13 × 192 × 41 × 191 × 761 × 2711 × 6841 × 9041 × 15101 × 60497 × 145501 × 199501 × 253081 × 269117 × 13828961 × 74792209 × 284647361 × 6261053129<10> × 223962569921<12> × 3189146193161<13> × 54531393851401<14> × 3697367283002441<16> × 202438500542522921<18> × 6089884909802812423<19> × 542059346041565200721<21> × 1961870762757168078553<22> × 211447769376727722511921<24> × 1659352458887702863021373641<28> × 460137572778371557785054623257871<33> × 1862457611364175487570409238012726994823669889631<49> × 24233168274463773052308872768014417720505813061818062962123091<62> × 2008149459694048759873021675544596430126634734841857796307140361<64> |