Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 273: | \[{15^{273}-1\over14}\] | 7 × 43 × 53 × 241 × 547 × 911 × 1249 × 3823 × 20749 × 157483 × 1743463 × 16655159 × 24002161 × 124074497 × 2817034275427<13> × 936800875930739<15> × 56782089706135249<17> × 606451512892729597861<21> × 1751898328544152699647421291268992709749362876250277<52> × 205292380232276429450734246986876102866568251571044089195692932257123145449495398511737541562506830851977451097295546542060779234449812957559619989<147> |