Re: Genesis-mining.com || World's leading hashpower provider!
I did this for those people who prefer rigid historical analysis versus future modelling of economic conditions analysis. I know some people prefer the former to the latter, even if that kind of analysis is less profitable in the long run 
Using this chart at coindesk:
http://www.coindesk.com/data/bitcoin-mining-difficulty-time/
20 May 2014: 6.9 billion start
27 September 2014: 34.6 billion finish
Net increase over 4.3 months 5x or 500% higher
28 September 2014: 34.6 billion start
11 February 2015: 44.45 billion finish --Today---
Net increase 4.3 months 28.46%
The last measurement over the last 4.3 months looks much better and speculatively hints at a difficulty halting its rising trend at some point in 2015 (at least for a short while)
Using this chart at coindesk:
http://www.coindesk.com/data/bitcoin-mining-difficulty-time/
20 May 2014: 6.9 billion start
27 September 2014: 34.6 billion finish
Net increase over 4.3 months 5x or 500% higher
28 September 2014: 34.6 billion start
11 February 2015: 44.45 billion finish --Today---
Net increase 4.3 months 28.46%
The last measurement over the last 4.3 months looks much better and speculatively hints at a difficulty halting its rising trend at some point in 2015 (at least for a short while)