Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 421: | \[{5^{421}-1\over4}\] | 14894981 × 31410466159536169<17> × 73688412163867840421869<23> × 2510106373340528083960492234939<31> × 6226633359276226469107090691434236881<37> × 622232758780358778126190590256749954524999505890859340251987532999<66> × 1376892416986891660868888952709866680522212404877414052781432896337974197524345976334022067211965993249761230743801<115> |