Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 159: | \[{7^{159}-1\over6}\] | 3 × 19 × 8269 × 32119 × 319591 × 1695259 × 84247682063005850464952755729<29> × 38904276017035188056372051839841219<35> × 1455329561052597138348454392994231780317942530389<49> |