Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 688: | \[{7^{688}-1\over6}\] | 26 × 52 × 17 × 173 × 947 × 1033 × 1201 × 2753 × 19867 × 20899 × 163573 × 169553 × 235211 × 3799051 × 4749781 × 9127292833<10> × 166003607842448777<18> × 1240400287144237937<19> × 2192537062271178641<19> × 38417867349927946206092222481953<32> × 384756252551799653157355170166535055814550369<45> × 1049139601018587804651174395448130408419345356019601<52> × 533721886283112766162388808829964093134556068537042973846397895277<66> × 2173703731055426905910556968969955685250785756145655944668757366164849<70> × 808664959719973519753986375380415484838610799061477331355701577472136291718945644206868792398842753662386216461541116360106258221705304887745690241824935094092161228159707048472957129181076988587089<198> |