Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 680: | \[{7^{680}-1\over6}\] | 25 × 53 × 11 × 41 × 137 × 191 × 281 × 1021 × 1201 × 1531 × 2801 × 4021 × 4931 × 14009 × 15641 × 20129 × 94793 × 59361349 × 2767631689 × 810221830361<12> × 15079254951041<14> × 29078814248401<14> × 1590988506392861<16> × 15425560249042501<17> × 133088039373662309<18> × 3585220859700498881<19> × 26072363006406325854739861<26> × 876140237882650743181330518048784908341<39> × 638991748543082113037456009420293477766438233<45> × 138497973518827432485604572537024087153816681041<48> × 3697225689150680879316077154760974088202707683287674592489990221<64> × 44419246125450294699163763316975408730046336737581704109301640498268386702884150526155801<89> × 58958657835150761852369909902147384261499392988170219146760883242751285183979081044940681041<92> |