Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
329: | \[2^{329}-1\] | 127 × 2351 × 4513 × 12503 × 200033 × 9106063 × 13264529 × 270447871 × 9934018379230425610659608142885693781941091888647157503817<58> |