Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 526: | \[{4^{526}-1\over3}\] | 5 × 1579 × 23671 × 92051 × 119929 × 731141 × 99972364781<11> × 13572264529177<14> × 29261114397558193<17> × 43195464658778477<17> × 80181854738775471107692957<26> × 120226360536848498024035943<27> × 383725126655170964501315730676446647<36> × 4279318502765963680153103023323603817<37> × 1161625406204540347970098063703363946902736086742697099<55> × 338153229347093487293402061645864051641494661202651405269<57> |