Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 150: | \[{4^{150}-1\over3}\] | 3 × 53 × 7 × 11 × 13 × 31 × 41 × 61 × 101 × 151 × 251 × 331 × 601 × 1201 × 1321 × 1801 × 4051 × 8101 × 63901 × 100801 × 268501 × 10567201 × 13334701 × 1182468601 × 1133836730401<13> |