Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 375: | \[2^{375}-1\] | 7 × 31 × 151 × 601 × 751 × 1801 × 100801 × 10567201 × 269089806001<12> × 4710883168879506001<19> × 2139731020464054092520609592459940706818275139793055476751<58> |