Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 280: | \[{7^{280}-1\over6}\] | 25 × 53 × 11 × 29 × 41 × 71 × 113 × 191 × 281 × 337 × 421 × 911 × 1201 × 2129 × 2801 × 4021 × 4733 × 517553 × 12128131 × 515717329 × 603926681 × 2127431041 × 13564461457<11> × 77192844961<11> × 102314938321<12> × 810221830361<12> × 18690488255321<14> × 19584845505919961<17> × 1347698311896398262115524401787850534828614953985505327369990790423147269305628801<82> |