Oh yeah, 1,000,000 e/sec I think it was, there\'s an interesting thread on that here:
http://star-made.org/content/challenge-smallest-1000000-powers-reactor
I believe the smallest for 1,000,000 e/sec is a cube of 23x23x23, Brawndoolz managed to get 1,039,875.9 e/sec out of his which is the most...