Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 226: | \[{15^{226}-1\over14}\] | 24 × 227 × 3391 × 6781 × 5171333 × 676653946487<12> × 5358063355525776963451<22> × 16414664743082353095967141<26> × 367508084381203624767165304975303<33> × 307847700691188940742226864042312706355744079321253627253<57> × 1537861910551454633243525748690200935714296300623626089102209700603649882470566978076369406450205047<100> |