Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
313: | \[{3^{313}-1\over2}\] | 2370037 × 3759897752153653302941126019779<31> × 2714675534408576046409316982151068303918417599<46> × 4511008462521852114321277415331379373893623015839928733115961370993<67> |