Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 420: | \[{7^{420}-1\over6}\] | 24 × 3 × 53 × 11 × 13 × 19 × 29 × 31 × 43 × 61 × 71 × 113 × 181 × 191 × 211 × 281 × 421 × 911 × 2801 × 4021 × 4733 × 51031 × 159871 × 309079 × 5981641 × 6568801 × 12128131 × 147388921 × 603926681 × 2127431041 × 11898664849<11> × 13564461457<11> × 77192844961<11> × 102314938321<12> × 555915824341<12> × 18690488255321<14> × 19584845505919961<17> × 338640865331157691<18> × 195489390796456327201<21> × 450798894542150330401<21> × 42693162668620904426304495389707999425601<41> × 1497464122835424133850979618475205790152429530208710746669752375041<67> |