Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 420: | \[{19^{420}-1\over18}\] | 23 × 3 × 52 × 74 × 11 × 132 × 29 × 31 × 432 × 61 × 71 × 127 × 151 × 181 × 197 × 211 × 271 × 421 × 701 × 769 × 911 × 1051 × 2251 × 5237 × 15541 × 70841 × 116131 × 226871 × 343393 × 524119 × 1081291 × 2141413 × 2460181 × 30640261 × 41888491 × 68443621 × 116895941 × 171434401 × 1050848401 × 1301151937 × 14533200697<11> × 16936647121<11> × 1687178375041<13> × 59917494450031<14> × 289538680721431<15> × 1763028507911581<16> × 41921106691107421<17> × 6143420725017753335538251341<28> × 65365284260571112024359304391<29> × 1250538273693912788345859248011<31> × 5156590470591163710974829741361<31> × 11664334029383165605131371010993341<35> × 5206520255936910609072540845913496243195666334401<49> × 5724203243389451841222306733854384481092529358107648052130720841446193864351277761<82> |