Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 145: | \[{6^{145}-1\over5}\] | 5 × 311 × 132241 × 150433631394488258261<21> × 7369130657357778596659<22> × 59580423676805748420140957215180302958743471829183098610333631<62> |