m3.2xlarge --

~/primecoin-0.1.1-hp4/src$ ./primecoind getmininginfo
{
    "blocks" : 63588,
    "currentblocksize" : 1000,
    "currentblocktx" : 0,
    "errors" : "",
    "generate" : true,
    "genproclimit" : -1,
    "primespersec" : 3899,
    "pooledtx" : 0,
    "testnet" : false
}


definitely not worth it.