Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
287: | \[2^{287}-1\] | 127 × 13367 × 164511353 × 17137716527<11> × 51954390877748655744256192963206220919272895548843817842228913<62> |