Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 311: | \[{7^{311}-1\over6}\] | 3733 × 106363 × 310379 × 171251016147061382719721<24> × 300816696076140900609570360532034016686672572500196266141997289033<66> × 1756560862778457393639774753663646868150598408308118878219230555826805955171841738531624623756542243961880565002404773332396762823189273396255385704913755864589<160> |