Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[{7^{261}-1\over6}\] | 32 × 19 × 37 × 59 × 523 × 1063 × 5743 × 127540261 × 2576743207 × 83226515419<11> × 71316922984999<14> × 710074092185677<15> × 196915704073465747<18> × 358475907408445923469<21> × 474062506708242760701771553376690953<36> × 112243506716032303875156473124661383297770138179344405248299895382874333531<75> |