Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 84: | \[{7^{84}-1\over6}\] | 24 × 3 × 52 × 13 × 19 × 29 × 43 × 113 × 181 × 911 × 4733 × 51031 × 309079 × 11898664849<11> × 13564461457<11> × 195489390796456327201<21> |