Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 309: | \[{15^{309}-1\over14}\] | 241 × 1031 × 37493 × 507243071 × 4047146041 × 5627147707<10> × 96306861556309936387593197402996201073146200561<47> × 519026385414723540853974413380365896722060122651956414117<57> × 34304029064161244089054981363881344295072979807060807813924554656049411208304504902637779718876398953402031967014667321850868847529487687227443283185099238757422000598578373874442042340673803268787942518777206918436276203<221> |