Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 384: | \[{15^{384}-1\over14}\] | 210 × 13 × 17 × 97 × 113 × 193 × 211 × 241 × 257 × 769 × 1489 × 2689 × 3169 × 3877 × 7121 × 15361 × 91297 × 151553 × 179953 × 243073 × 1659649 × 70237697 × 1248882721 × 2562840001 × 4151706817 × 1391359510721<13> × 12779004583099009<17> × 5765807395792521302977<22> × 17347644250739140028840698753<29> × 4871829138071848601730474137089<31> × 5040054997946379205834956885834881<34> × 2323039494547285131093389476979268943602323873692962834628974721<64> × 119668965450879482049363313225688003030732965984195053586626897186049<69> × 10083633967969564714703304636194102100019954465320541718312396203760257<71> |