4

according to https://testnet.etherscan.io/, the last block has been mined more than 12 hours ago, whereas before more than one were mined per minute. Has the difficulty changed so much ? Or has the testnet problems ?

4

The testnet was reset due to various complications, one being a consensus issue between Geth and Parity. You can read about it here:

https://blog.ethereum.org/2016/11/20/from-morden-to-ropsten/

See the bottom of the page for instructions on running on the new testnet, Ropsten.

Not the answer you're looking for? Browse other questions tagged or ask your own question.