Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 305: | \[{20^{305}-1\over19}\] | 11 × 612 × 251 × 1831 × 2441 × 35381 × 427001 × 1575631 × 8884651 × 35048294944811<14> × 74324733207911<14> × 98381879746202914021<20> × 2335369446603602658437101<25> × 5823251621329007431363601<25> × 62737302416497373544703634043321526419521<41> × 5659784747821331230431654824725808002385097133154909051<55> × 114184840825470580007613898528487585541436290328309951915958576493491<69> × 250004752293643177905909300730261542280429339014496102992202803222855058298744942704198372481442311<99> |