Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 384: | \[{20^{384}-1\over19}\] | 32 × 7 × 13 × 17 × 97 × 127 × 193 × 401 × 421 × 577 × 641 × 769 × 1153 × 6529 × 10369 × 12277 × 31177 × 61057 × 160001 × 821113 × 675796129 × 1505882353 × 969759919969<12> × 4213987444481<13> × 19781545588481<14> × 6756288659793814433<19> × 82832842974154279534081<23> × 457543353681844436585642037889<30> × 6016843417749425380073724334377601<34> × 26715523979628786958854098728207361<35> × 41421229588195582987688749156138489729<38> × 61750546109241021215734459867961040964362932229121<50> × 7269653794450334650395571246564962394472494027948417<52> × 86463857536702314544956541440291367696121531011883157238778420153841598998532653995678443386556042528897<104> |