According to Wu, recently, Jameson Lopp, the founder of Casa, launched a malicious attack on the Bitcoin test network, producing three years' worth of blocks in one week, totaling more than 165,000. Lopp said that his goal was to improve rather than weaken the Bitcoin test network, and advocated resetting it to ensure that the test network coins had no value and fix errors in the test network consensus code. He also claimed that the attack only cost $1 in electricity. Mempool data showed that on April 20, the hash rate of the Bitcoin test network soared to 2,315 TH/s.