Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 255: | \[{15^{255}-1\over14}\] | 11 × 61 × 103 × 241 × 1123 × 4931 × 1022449 × 3496561 × 8308921 × 39225301 × 1045002649 × 6734509609<10> × 97406069823939953821<20> × 16515734244780407477383694521<29> × 931378506426564665578619857096187041<36> × 1737312434693929309175606904667659697444924171560401053012526469801639759361<76> × 29036641623807714312346593385830254724118802386232872201709350252138864635126961<80> |