Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 522: | \[{7^{522}-1\over6}\] | 23 × 32 × 19 × 37 × 43 × 59 × 523 × 1063 × 5743 × 8353 × 117307 × 127540261 × 2576743207 × 5406066031<10> × 83226515419<11> × 10117999187011<14> × 71316922984999<14> × 710074092185677<15> × 196915704073465747<18> × 1284564941030772067<19> × 34720058992462423813<20> × 358475907408445923469<21> × 402488219476647465854701<24> × 15093933143414026146604003<26> × 8155614065469213507617261089<28> × 474062506708242760701771553376690953<36> × 913143063363823251615541935759248962455135741640693782028976288065710841<72> × 112243506716032303875156473124661383297770138179344405248299895382874333531<75> |