Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 381: | \[{5^{381}-1\over4}\] | 31 × 17365824770202511<17> × 2146271536375625882474712607488854837881<40> × 12882995722731844746940951540119250212241259630747509<53> × 232071850047734595810657641340191685995462669499867768115441253013859<69> × 14693679385278593849609206715278070972733319459651094018859396328480215743184089660644531<89> |