Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 214: | \[{15^{214}-1\over14}\] | 24 × 643 × 1499 × 12841 × 28463 × 194527 × 706201 × 609913483 × 17221279121951<14> × 32080966073306964705079<23> × 8296079506365811612150733<25> × 8238863910860240211186514584551<31> × 368612716550576240747224386242176921<36> × 5243115820050874816041353382038444405325918728956026626276894264028638373742836350982323<88> |