Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 415: | \[{4^{415}-1\over3}\] | 11 × 31 × 167 × 499 × 1163 × 2657 × 116201 × 155377 × 134396921 × 13455809771<11> × 470933694191<12> × 3028917598961<13> × 130666175908831<15> × 57912614113275649087721<23> × 32367218471375835379289471<26> × 46782247616476922972329742136208001<35> × 50929180793846693291417995382274682032538517912143288980598150164689406520921833577411<86> |