Interesting post from Mining Spec forum.
When calculated in the OP over the time period from March 14, 2013 to March 13, 2014 the average increase in the difficulty and hash rate was
23.92% per adjustment period and the average length of each adjustment period was
11.38 days.
Recalculating over the period June 29, 2013 to June 29, 2014 it is
23.45% and
11.41 days.
Assuming the network growth rate over the next year is the same as it was this last year we get:
Hash Rate Power Energy Cost Cost
Date Difficulty TH/s MW MWh $/Period $/BTC
--------- ------------------ ----------- ------- ---------- -------------- ----------
10-Jul-14 20,762,587,053 148,627 149 40,687 $4,068,655 $80.73
21-Jul-14 25,631,656,286 183,481 183 50,228 $5,022,802 $99.66
02-Aug-14 31,642,579,140 226,510 227 62,007 $6,200,707 $123.03
13-Aug-14 39,063,133,629 279,629 280 76,548 $7,654,846 $151.88
25-Aug-14 48,223,894,840 345,205 345 94,500 $9,449,997 $187.50
05-Sep-14 59,532,961,579 426,160 426 116,661 $11,666,131 $231.47
16-Sep-14 73,494,136,594 526,100 526 144,020 $14,401,975 $285.75
28-Sep-14 90,729,370,258 649,476 649 177,794 $17,779,407 $352.77
09-Oct-14 112,006,467,575 801,786 802 219,489 $21,948,885 $435.49
21-Oct-14 138,273,292,794 989,814 990 270,962 $27,096,155 $537.62
01-Nov-14 170,699,995,402 1,221,937 1,222 334,505 $33,450,520 $663.70
12-Nov-14 210,731,138,613 1,508,495 1,508 412,951 $41,295,058 $819.35
24-Nov-14 260,150,052,591 1,862,255 1,862 509,792 $50,979,231 $1,011.49
05-Dec-14 321,158,279,258 2,298,976 2,299 629,345 $62,934,457 $1,248.70
17-Dec-14 396,473,647,839 2,838,112 2,838 776,933 $77,693,322 $1,541.53
28-Dec-14 489,451,350,262 3,503,683 3,504 959,133 $95,913,314 $1,903.04
08-Jan-15 604,233,410,162 4,325,337 4,325 1,184,061 $118,406,107 $2,349.33
20-Jan-15 745,933,204,108 5,339,679 5,340 1,461,737 $146,173,722 $2,900.27
31-Jan-15 920,863,255,215 6,591,897 6,592 1,804,532 $180,453,167 $3,580.42
12-Feb-15 1,136,816,447,014 8,137,773 8,138 2,227,715 $222,771,543 $4,420.07
23-Feb-15 1,403,413,185,274 10,046,176 10,046 2,750,141 $275,014,073 $5,456.63
06-Mar-15 1,732,529,973,307 12,402,122 12,402 3,395,081 $339,508,086 $6,736.27
18-Mar-15 2,138,828,493,208 15,310,564 15,311 4,191,267 $419,126,699 $8,316.01
29-Mar-15 2,640,408,762,814 18,901,071 18,901 5,174,168 $517,416,806 $10,266.21
10-Apr-15 3,259,615,465,609 23,333,592 23,334 6,387,571 $638,757,092 $12,673.75
21-Apr-15 4,024,033,374,406 28,805,592 28,806 7,885,531 $788,553,093 $15,645.89
02-May-15 4,967,716,213,515 35,560,840 35,561 9,734,780 $973,478,006 $19,315.04
14-May-15 6,132,703,703,449 43,900,273 43,900 12,017,700 $1,201,769,972 $23,844.64
25-May-15 7,570,894,370,329 54,195,400 54,195 14,835,991 $1,483,599,070 $29,436.49
06-Jun-15 9,346,357,550,986 66,904,854 66,905 18,315,204 $1,831,520,385 $36,339.69
17-Jun-15 11,538,187,590,255 82,594,824 82,595 22,610,333 $2,261,033,313 $44,861.77
29-Jun-15 14,244,027,380,899 101,964,275 101,964 27,912,720 $2,791,272,041 $55,382.38
In other words something has got to give by the end of the year, or actually before November 1
