Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 428: | \[{19^{428}-1\over18}\] | 23 × 5 × 181 × 13697 × 55213 × 15904909 × 888614029 × 3007407565761480289<19> × 1676329291481651740675733<25> × 15397445015561901769177599177852399413040319430618027104698162523645590565934787202306093288697094391936151023188342147208619<125> × 3727029213159221227481880371758988192479699585560736992193446518019059007305528138257031138276615655165685013865802400046939654576178541<136> × [50263867409689723149500944168736654834795065418302493125252181740871682069373106141497760121609235616756814607698284455924434579277344468055731900721825816583118272774171855312704556950474670367781921634543640075869<215>] |