Quote from: HugoTheSpider on January 02, 2016, 12:50:33 PM

Quote from: Bulista on January 02, 2016, 12:23:50 PM

Your results are from CPU or GPU?

What's your performance?

I was involved in the challenge and earned some BTC. I speedhacked the code in the mealtime at work straight after I saw the puzzle back in January 2015 and started it on some server remotely. The first version could do about 100,000 keys/s using a CPU. After some improvements I boosted the rate to 700,000 keys/s on a single computer. Later I ran it on many computers and checked million of keys/s. Luckly I could recycle the code later in the August 2015 puzzle at https://bitcointalk.org/index.php?topic=1144807.0
I had no time to learn how to code on a GPU.

I've tried my first version using openssl and got about 25,000 keys/s (single-thread). You seem to use something other than openssl.

Unlike hash operations, elliptic curve operations have unpredictable machine cycle count. Thus, speed-up on SIMD processors (e.g. GPUs) won't be great.

BTW, whoever created this challenge will be able to manipulate BTC price, won't she/he?