Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 541: | \[2^{541}-1\] | 4312790327<10> × 6115209994009<13> × 77146448294831869472151022106713<32> × 904106555381898703253733254107256591<36> × 3913112911835820709255943886069525362580351752909309688547154382752707879<73> |