Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 180: | \[{7^{180}-1\over6}\] | 24 × 32 × 53 × 11 × 13 × 19 × 31 × 37 × 43 × 61 × 181 × 191 × 281 × 541 × 1063 × 2801 × 4021 × 9901 × 117307 × 154351 × 159871 × 295831 × 6568801 × 7777981 × 1527007411 × 13841169553<11> × 125096112091<12> × 555915824341<12> × 1795168434777002101<19> × 2065025164427492401<19> |