Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
206: | \[{15^{206}-1\over14}\] | 24 × 1031 × 37493 × 1134649 × 507243071 × 200298637228693651547511121879<30> × 1255816237933704895555335739049629<34> × 96306861556309936387593197402996201073146200561<47> × 3004789663465678591924723204758441117094121715756829<52> × 519026385414723540853974413380365896722060122651956414117<57> |