Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
278: | \[{6^{278}-1\over5}\] | 7 × 557 × 21407 × 128159 × 478404033683<12> × 190499431829426403200101169876785677642490596937278842226897447732472637176807419519306808486559<96> × 434641239506340074168962702745282290778770859506201434785502786008976827342013029086051111724237<96> |