Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 509: | \[{5^{509}-1\over4}\] | 1019 × 219889 × 3600024661 × 1258198860123384481<19> × 4756095391999990292067628948735218974443737998939<49> × [3090218639062915344503419301203215742963632790464415737081799260019520585904957405667033585269011437269191260498215642047645159240136553531894845560011982341578680670965469313817023519369249350237499549888142019714298749384097782514105071089764120898313798455628312043609<271>] |