Still unsolved. The private key for this puzzle is an integer between 2^142 and 2^143 − 1, and whoever finds it can sweep 14.30000000 BTC from 13N66gCzWWHEZBxhVxG18P8wyjEWF9Yoi1.
Only the address is known, so a solver has to walk the interval: multiply the secp256k1 generator by each candidate key, hash the compressed public key with SHA-256 and RIPEMD-160, and compare with the address’s hash160. On average that is 2^141 tests, about 2.79e+42. A single high-end GPU running BitCrack or keyhunt manages roughly a billion tests per second.
Try cracking #143 in your browser How solvers really attack it