Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 259: | \[{5^{259}-1\over4}\] | 149 × 19531 × 13971969971<11> × 8737481256739<13> × 1483253451821989<16> × 12331512430205535516641371<26> × 415321840426452221170658421326334142542846261922617410925283443238438974033992932819012017226445839135990537159<111> |