Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
263: | \[{7^{263}-1\over6}\] | 111473077 × 246420328513<12> × 125964970427584638596267035086794589086977<42> × 330356473356706630143084182110481076968694111519479821312366757981<66> × 265799489010506998952247476548157401788003618449001603472530395754819736985343973809633195038761<96> |