Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 56: | \[{7^{56}-1\over6}\] | 25 × 52 × 29 × 113 × 337 × 911 × 1201 × 2129 × 4733 × 517553 × 515717329 × 13564461457<11> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 56: | \[{7^{56}-1\over6}\] | 25 × 52 × 29 × 113 × 337 × 911 × 1201 × 2129 × 4733 × 517553 × 515717329 × 13564461457<11> |