Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 310: | \[{7^{310}-1\over6}\] | 23 × 11 × 191 × 311 × 373 × 2801 × 5581 × 21143 × 21391 × 21701 × 60761 × 6689491 × 9754399 × 1622982371 × 9254997611<10> × 136823162401<12> × 92105555489371<14> × 5420506947192709<16> × 3999088279399464409<19> × 18127525360389024220391<23> × 569137141964300277257759320744141368811<39> × 31728015189946773062954921268435825250349092899077924422648569887851893731<74> |