Test calculate_target.
Test calculate_target.

muchbeli/bitcoin-abe,mmitech/bitcoin-abe,Max-Coin/maxcoin-abe,jeorgen/bitcoin-abe,cryptapus/bitcoin-abe,jeromewu/bitcoin-abe-opennet,gjhiggins/altcoin-abe,ultracoindev/ultracoin-abe,Serya05/bitcoin-abe,ultracoindev/ultracoin-abe,Dilmacoin/dilmacoin-abe,ultracoindev/ultracoin-abe,Max-Coin/maxcoin-abe,ultracoindev/ultracoin-abe,Serya05/bitcoin-abe,CraigsCoin/abe-craigscoin,gjhiggins/chaincoin-abe,CraigsCoin/abe-craigscoin,jeromewu/bitcoin-abe-opennet,muchbeli/bitcoin-abe,muchbeli/bitcoin-abe,jonnynewbs/bitcoin-abe,cryptapus/bitcoin-abe,muchbeli/bitcoin-abe,gjhiggins/abe-bee2,UdjinM6/darkcoin-abe,gjhiggins/abe-bee2,mmitech/bitcoin-abe,UdjinM6/darkcoin-abe,jeorgen/bitcoin-abe,ultracoindev/ultracoin-abe,gjhiggins/altcoin-abe,jonnynewbs/bitcoin-abe,gjhiggins/chaincoin-abe,gjhiggins/abe-bee2,Dilmacoin/dilmacoin-abe