Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 427: | \[{4^{427}-1\over3}\] | 43 × 127 × 33282089 × 57461778571<11> × 768614336404564651<18> × 2305843009213693951<19> × 1340235308854811506044205739394787<34> × 45388918821243922076531264049185505868800192485507712713181818563<65> × 35560193412972319062061768261639727517478499914167548496031688280584977077562191671059223282469465959<101> |