Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 258: | \[{31^{258}-1\over30}\] | 25 × 3 × 72 × 19 × 173 × 331 × 1291 × 1190671 × 146982701137<12> × 5408368622183010019<19> × 190775487976687263834219681558372322789<39> × 3049055684506560663410351046998584180840895763387409<52> × 2428604265313757770804574128250982331185007279645995324037847<61> × 788328401535596852912593542736318779802066472731161317043276936671666401844157088039<84> × 28268213368244207021067545104813760525436762850832706185611685178643757376267942042333476824202437189<101> |