Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 653: | \[{4^{653}-1\over3}\] | 1307 × 78557207 × 289837969 × 12550478467<11> × 16008527538753578495897<23> × 3044938125828889184039273431<28> × 3786707123184812723340717607<28> × 739629398215461986863452049897<30> × 1025036797911626106395517257052900895571510278920191436836561586088140307<73> × 1001789376918765734870011421520776990659071341351344074026389475051521292968710481<82> × 8893122618977158614989714180722964331426004820169213558574794542353622623988934429093001259164784553073<103> |