Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 137: | \[{6^{137}-1\over5}\] | 6577 × 25247731 × 53280671 × 60042056488501962187<20> × 15222145108790213296269418433344906793793551301042423026314429342733<68> |