Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 408: | \[{7^{408}-1\over6}\] | 25 × 3 × 52 × 13 × 19 × 43 × 73 × 103 × 137 × 181 × 193 × 409 × 1201 × 2857 × 14009 × 20129 × 94793 × 365773 × 1135261 × 12192877 × 59361349 × 85647973 × 2316281689 × 2767631689 × 10879733611<11> × 2852622546217<13> × 29078814248401<14> × 90920746649833<14> × 133088039373662309<18> × 14736450261056323705201<23> × 5086481441583177338046988872433147843691941<43> × 638991748543082113037456009420293477766438233<45> × 35407296829001368784183815734911731920219314488071437585067864240471706153<74> |