Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
82: | \[{7^{82}-1\over6}\] | 23 × 83 × 4849399 × 8999993 × 20515909 × 1636258751 × 78009515593<11> × 4362139336229068656094783<25> |