Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 475: | \[{7^{475}-1\over6}\] | 419 × 2551 × 2801 × 36671 × 1966385431 × 4534166740403<13> × 31280679788951<14> × 11317814613933992051<20> × 1144066265767763993990721726534802301<37> × 83588499889013461558350575326824370345112529401<47> × [1327561986485766187593613402928432652174835219422443923831041237724179642304997855389664168511253598087891740335002426013708310588588887994848408452213210999788338694789834655092779366115938671682730696417727883289283096340874154074988095996102836151<250>] |