// Exception 2 - Reduce difficulty if current block generation time has already exceeded maximum time limit. (NB! nLongTimeLimit must exceed maximum possible drift in both positive and negative direction)
    if ((pblock-> nTime - pindexLast->GetBlockTime()) > nLongTimeLimit)  //block.nTime
    {
        // Reduce in a linear fashion at first, and then start to ramp up with a gradual exponential curve (to catch massive hash extinction events)
        int64_t nNumMissedSteps = ((pblock-> nTime - pindexLast->GetBlockTime()) / nLongTimeStep);
        if (nNumMissedSteps <= 12)
            bnNew *=  nNumMissedSteps;
        else
            bnNew *=  12 + (int64_t)std::floor(std::pow((float)1.14, (float)nNumMissedSteps - 12) + 0.5);

        if (fDebug && (nPrevHeight != pindexLast->nHeight ||  bnNew.GetCompact() != nPrevDifficulty) )
            sLogInfo +=  strprintf(" Maximum block time hit - halving difficulty %08x %s\n", bnNew.GetCompact(), bnNew.ToString().c_str());
    }