Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 169: | \[{5^{169}-1\over4}\] | 13859 × 305175781 × 784646826705980283039372085276899721<36> × 1006733590176529722850423460072748896758960727573801229970212800434559<70> |