Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 749: | \[2^{749}-1\] | 127 × 46439 × 120618551047<12> × 227444841245238451591<21> × 162259276829213363391578010288127<33> × 963644196044828188869351734353847<33> × 4143416085716681490838653625856664863812512904964849<52> × 28249136705066576439522697433289867007783495956471223743249440199874751<71> |