Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 510: | \[{20^{510}-1\over19}\] | 32 × 7 × 11 × 31 × 61 × 103 × 127 × 251 × 409 × 421 × 1021 × 1361 × 1429 × 3001 × 3061 × 5101 × 60589 × 70891 × 126481 × 152381 × 261451 × 2230061 × 2567783 × 2640509 × 3698623 × 92054423 × 455851601 × 5671051081<10> × 18510970711<11> × 26876632021<11> × 45251724385781<14> × 36372797968360681<17> × 126433576549825993751<21> × 689852631578947368421<21> × 2025046074983629951481<22> × 540279704259122547163922701<27> × 2025172630358438680596186769<28> × 9455292441906384894947635501<28> × 20618734563137682873286763586661<32> × 2200293635138152581356053802893789<34> × 23303135002185020696981531258045152009458141181<47> × 616538645269540162160455855390419188413152562932920852276721781<63> × 317257586379935111284495781918150019632865513166536697695987823413982590749322870871<84> × 28712981454797271785896146436687257664460572969769446957704206211996704117531165819110649467321<95> |