Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 490: | \[{19^{490}-1\over18}\] | 22 × 52 × 11 × 71 × 151 × 197 × 491 × 701 × 911 × 1471 × 2251 × 70841 × 226871 × 707561 × 167291881 × 51326794793<11> × 1680940976006321<16> × 65365284260571112024359304391<29> × 5156590470591163710974829741361<31> × 40030321143939714800754628767062621<35> × 59406262713432872236099181572519757<35> × 510095203167924318152120324312866078462380276415979467<54> × 966689188651388775763273328717015651347971790864338300673006592568466166457818689897775040300024915537428127895863947010929101850523644010104598307199556851<156> × [137887046246230388136203417981650004465185016801883878151487055090729529821449773596439008408796564761135780532012808565527896389912731119567965938045186406136074572381964457564618351403731592370058314182970161331<213>] |