Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 216: | \[{28^{216}-1\over27}\] | 33 × 5 × 13 × 192 × 29 × 37 × 73 × 109 × 127 × 157 × 163 × 271 × 541 × 757 × 7129 × 7321 × 24481 × 47221 × 50221 × 102547 × 314497 × 444979 × 498961 × 614657 × 51605161 × 188878213 × 343785529 × 1088419897 × 2320484707 × 221635039321<12> × 235922815189<12> × 428485444021<12> × 2714261904253<13> × 301407243681066768937<21> × 68948693997660959163751<23> × 393882427859181117808681<24> × 1302797035643279168782726785397765369149068880799276485726423442752944417144353<79> |