Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 178: | \[{28^{178}-1\over27}\] | 29 × 179 × 11927 × 51977 × 213067 × 7255103 × 13132072291620102937<20> × 174429180502286655544684177<27> × 1464915243919865660862563717<28> × 4059833510327630029661717362714399502964442975989493252859025297431<67> × 214654232536534717362018939506696980445489631453230772552822854938115326121133488835159519827<93> |