Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 310: | \[{4^{310}-1\over3}\] | 52 × 11 × 312 × 41 × 311 × 5581 × 8681 × 11161 × 11471 × 37201 × 49477 × 73471 × 87421 × 384773 × 52597081 × 715827883 × 2147483647 × 4649919401<10> × 8973817381<10> × 18158209813151<14> × 5947603221397891<16> × 29126056043168521<17> × 24865899693834809641<20> × 57805828745692758010628581<26> |