Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 402: | \[{4^{402}-1\over3}\] | 3 × 5 × 7 × 13 × 269 × 1609 × 2011 × 3217 × 9649 × 10453 × 22111 × 132661 × 192961 × 6324667 × 7327657 × 15152453 × 42875177 × 193707721 × 214473433 × 2559066073 × 71848008781<11> × 175132692529<12> × 761838257287<12> × 6713103182899<13> × 9739278030221<13> × 59151549118532676874448563<26> × 15704900959651293774270521395753<32> × 87449423397425857942678833145441<32> |