Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
469: | \[2^{469}-1\] | 127 × 193707721 × 761838257287<12> × 70321958644800017<17> × 1839633098314450447<19> × 628683935022908831926019116410056880219316806841500141982334538232031397827230330241<84> |