Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 507: | \[{19^{507}-1\over18}\] | 3 × 79 × 127 × 157 × 599 × 29251 × 133338869 × 293064253 × 887960971 × 2002365067 × 421451911540236097<18> × 63725648128149671826207359193122737526111416347995452960729897714393<68> × 480006907877942117048885596560428966034382490628924431587365050763653774734575730530328446111716515421396948561484298257091050537937<132> × [1594473807220625168009869466256182370455569975961540177510067229357792284244185900849346246840279819522013664128619566393397321362510098237173839302749773724757513991756682984065439963287502292579096807771655327934007646796217480780076068276498113616773058476210736355642809292879535703168776158102257804807250210125765289588567304702510788411146589538028621100707978353543287221231<382>] |