Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 515: | \[{5^{515}-1\over4}\] | 11 × 71 × 1031 × 3709 × 28429 × 41201 × 96821 × 236985509596761461<18> × 326493403069610501<18> × 87332225947582956902696341<26> × 59117897713198738371603984809<29> × 39546955636451768643571562540114219<35> × 56727322344599853862293969440589550231<38> × 8693112016386012208667474531956646459249501<43> × 553490408322580586127891636648786565848906273691<48> × 159590257188166252251688944516530071948738326665990615928293410467328675450484835151<84> |