Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
617: | \[2^{617}-1\] | 59233 × 68954123297<11> × 157751978115225385495647532421006478127229405644601<51> × 844128455869220390432964719493514618402640004425573909495498148095803754815792818296643067760548829906291314807571121271<120> |