Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 153: | \[{15^{153}-1\over14}\] | 103 × 241 × 307 × 541 × 1123 × 21061 × 1022449 × 2199529 × 3496561 × 1045002649 × 6734509609<10> × 1529065687447<13> × 425171096278165981<18> × 97406069823939953821<20> × 182883374648164818705985733353475517551453564759950328016451505276621281081<75> |