Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 320: | \[{5^{320}-1\over4}\] | 26 × 3 × 11 × 13 × 17 × 41 × 71 × 241 × 313 × 521 × 641 × 2593 × 9161 × 11489 × 25601 × 29423041 × 75068993 × 131349761 × 632133361 × 167597261761<12> × 241931001601<12> × 909456847814334401<18> × 24625444126052524088217281<26> × 46957667265666758402894952584920394200961<41> × 6258266324069263267587145223441885541709510944641<49> |