alt Hacker NewsFun! If bi-twin chains are those where +1 AND -1 are prime, I wonder what the longest chain is where either +1 OR -1 are prime. And while we're at it, why not XOR too.
Fun! If bi-twin chains are those where +1 AND -1 are prime, I wonder what the longest chain is where either +1 OR -1 are prime. And while we're at it, why not XOR too.