Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 307: | \[{5^{307}-1\over4}\] | 30093907237519<14> × 41907329770349<14> × 3707465989826721707843621775363101765344082634099897042729510565487681100579030907337171<88> × 2050621925362568850758906978191222263653245447730824197412769132104307595730412886518106372792666631<100> |