Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 406: | \[{31^{406}-1\over30}\] | 25 × 59 × 349 × 10789 × 11971 × 49823 × 71821 × 404783 × 1838659 × 917087137 × 1482570191 × 11242578713<11> × 189343400041<12> × 1671541885847<13> × 3061037680116618496603<22> × 53780507732292545931217<23> × 1458808736357831720257829477423<31> × 436416208132108870690611078121189613493435653673653216206859760321884412970573794052671586505340393250829949060241986607507665812737811553594513449294562957472857333193365424399738430732109433926431<198> × [90225767247316150513081867823562812851974107061871963459342538358276252140930222561825498256150607991729434409822476553094728731063982766822344806355580660099785784660488825805002447479028569202610209110419781524216001140744707501327184907076687<245>] |