Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 227: | \[{8^{227}-1\over7}\] | 26986333437777017<17> × 962744903648208108713898832235090314894033<42> × 7992177738205979626491506950867720953545660121688631<52> × 6902537314868528928592064072776405259752901898281447036002004855019689272630142411673519100423<94> |