Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 803: | \[2^{803}-1\] | 23 × 89 × 439 × 1607 × 2298041 × 78366377 × 1384018681 × 1533745237729<13> × 9361973132609<13> × 2762339998302448893880313142073<31> × 3736466000478735531744529269910404686590249432806808172410820028453362377924954475050904726442027867925638633713537193401016499086945743085700506306097297<154> |