Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 329: | \[{4^{329}-1\over3}\] | 43 × 127 × 283 × 659 × 2351 × 4513 × 12503 × 200033 × 9106063 × 13264529 × 270447871 × 165768537521<12> × 762394321774681<15> × 9934018379230425610659608142885693781941091888647157503817<58> × 359687424377961714750891763743933975334959200103759485840227631801<66> |