Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 405: | \[{5^{405}-1\over4}\] | 11 × 19 × 31 × 71 × 109 × 181 × 271 × 541 × 811 × 829 × 1171 × 1621 × 1741 × 4159 × 4861 × 6481 × 11071 × 31051 × 169831 × 297315901 × 921737881 × 2332368714077641<16> × 1312315694449748688331<22> × 26941244373060650224561<23> × 279151346689444799703543961<27> × 4732858648953373926861365363761501<34> × 11419697846380955982026777206637491<35> × 392380251491428839184362869324894224798565499317754604411<57> |