Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 276: | \[{7^{276}-1\over6}\] | 24 × 3 × 52 × 13 × 19 × 43 × 47 × 139 × 181 × 277 × 829 × 3083 × 21529 × 26497 × 26681 × 649981 × 15513961 × 5755716973<10> × 402011881627<12> × 7396787205469<13> × 31479823396757<14> × 153943464633957793<18> × 3421093417510114543<19> × 55681942361860463813<20> × 8501948915136155490673<22> × 235169662395069356312233<24> × 569065128438043359786356384350532017<36> |