Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 255: | \[{7^{255}-1\over6}\] | 3 × 19 × 31 × 103 × 1531 × 2801 × 4931 × 14009 × 159871 × 365773 × 580381 × 2316281689 × 2767631689 × 10879733611<11> × 326568900271<12> × 604822302841<12> × 138497973518827432485604572537024087153816681041<48> × 15096846837130239465648757385222262651370653348095151795880264132982652829169011<80> |