How does the Kimoto Gravity Well regulate difficulty?

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The recent Franko update ( will switch to the Kimoto Gravity Well difficulty adjustment algorithm first used in Megacoin.

Unfortunately there will be a drawback for the Franko Android Wallet App. The syncing of the blockchain will be slower than with the previous difficulty adjustment code after block 400,000. This is primarily a result of having to adjust the difficulty after every block.

There are parts of the code of the app that can slow down downloading the blockchain. The first is verifying the hash of each block. The second is verifying the difficulty of each block. Currently, the code for the scrypt hash function is executed natively (not in java) which provides significant speed advantages. We are hoping that we can optimize the Kimoto Gravity Well in Java so it does not become a bottleneck in the app...

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Peter Watson: have you done a video on worldcoin?

Pat Jack: I certainly would like to view your analysis of Worldcoin as it is in the top 5 Network Effect, or Total Network Hash Rates, of the Scrypt coins. In my opinion, the larger the network effect a coin exercises the greater the long term potential of the coin.

Ed Sael: good video about Megacoin

Lin Xu: could you make a video on world coin? and how it differs from other coins?

Adonte Macon: Brilliant

Super1 23: How and where do you mine this.

termin8ter4562: hey dbag why dont you freaking put up our robot video instead of making damn crypto vids. Im going to kill you soon if you dont post it

Janek Wieczorek: Jason, nice work.

davisaalvik: thanks Jason, good info and description of Megacoin. the $1 price right now is still very low compared to where we're headed in the coming months. Megacoin is eventually going to become a major global currency. our top-notch developers...

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Maxcoin will use the Kimoto Gravity Well (KGW) to regulate the difficulty. From what I could find about the KGW, it retargets after every block and adjusts very quickly, e.g. when multipools add and retract mining power to a smaller coin's network. Apparently, KGW = 1 + (0.7084 * (PastBlocksMass/144)^(-1.228)) (

-> Introductory post by Kimoto

) describes how to calculate the Kimoto Gravity Well. On another source, it was stated that "KGW is applied if the hash rate is high, and 1/KGW when the hash rate is low" (

-> Post on Catcoin's adoption of KGW

). This leaves me with three questions: What does PastBlocksMass refer to? Does KGW only rely on the time required to find the previous block? Why/How does the above formula produce the described fast adaptation of the...

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Launch date: February 12th, 2014.

History: YACCoin was born as "Yet Another Cyber Coin". We feel it was evolved into a new star in the cyber coin universe.

Why generate Yet Another Cyber Coin? Well, for starters, it was fun and a great way to learn about the communities associated with cyber coins (aka crypto coins), not to mention all the technical and programming challenges that needed to be overcome (both fun and educational). Along the way a great user community focused around the coin was born.

How are we different? The development team is in this for the long run and are active members in the altcoin community - helping select other altcoins succeed and working directly with pool and exchange operators as well as participating in altcoin industry forums. We have faith the coin will grow, and the passion to make sure it does. We have already been contacted by a couple of vendors wishing to use the coin, so we are encouraged it will be used for more than...

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After my initial post on

Vertcoin last week

, the difficulty started to do some interesting things. Mostly, it was reacting to miners jumping on and then off VTC, which resulted in the difficulty spiking up, then dropping down, then up again.... I didn't think we'd see that much variance thanks to the relative difficulty of getting the new VTC cgminer version running, but I was clearly wrong. Thankfully, the developers were already looking at improving the core design of VTC, and as such we have two major changes that are coming at block 26754, which should arrive some time in the next 12-16 hours.

First, the rollout schedule for changing N-Factors has been modified so that the first jump to N=12 (it's currently at N=11 while standard scrypt is N=10) will happen around early 2016. This will allow slightly older GPU hardware (think Radeon 5000 and 6000 series cards) to continue to mine VTC for two more years before it becomes potentially too demanding in terms of...

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This is the hashing algorithm that your coin will use for mining POW blocks. Each algorithm has it’s own set of advantages/disadvantages as outlined below.

SHA256: The original algorithm, the same one that Bitcoin uses. Use of this algorithm is generally not recommended unless you have a special reason to. ASICs (high powered, specialized mining devices) for this algorithm are widely available, which creates an unfair mining environment. Their availability also lends this algorithm to being vulnerable to numerous types of attacks involving hashpower (51% attack, etc).

Scrypt: The second algorithm made widely available, popularized by Litecoin. Scrypt also has ASICs available for it, however they are not as prolific as SHA256 ASICs and thus not as much of a threat to worry about. Still, this algorithm is probably not the best choice these days.

X11: Popularized by Darkcoin (now known as DASH), X11 uses 11 different hashing algorithms to arrive at a final...

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