Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 420: | \[{15^{420}-1\over14}\] | 25 × 7 × 11 × 13 × 29 × 31 × 43 × 61 × 71 × 113 × 211 × 241 × 421 × 1531 × 3361 × 3877 × 4201 × 4931 × 19231 × 19421 × 33601 × 131381 × 142111 × 278041 × 327517 × 531581 × 723031 × 1743463 × 4167731 × 10678711 × 39225301 × 191354311 × 497638891 × 706195561 × 363860910841<12> × 2399150554081<13> × 2817034275427<13> × 4454215139669<13> × 15360796671433620373<20> × 36083117529286469251<20> × 53096945644422356461<20> × 14248663932290065014093421<26> × 24596480723711374110433501<26> × 44302140197578717455741337921<29> × 12340745958492257916284855626741<32> × 1471639728507736930149132068430094904381<40> × 7932768905454001682788103126150859356223484658332619961547715995032604114192277379825237553430521<97> |