Limited release, production rate before this limit re-evaluated with the production of every block (at a rate of approximately 1 block per minute) based on the difficulty with which primecoins are produced.[citation needed]
Primecoin was launched in 2013 by Sunny King, who also founded Peercoin.[4][5]
Unlike other cryptocurrencies, which are mined using algorithms that solved mathematical problems with no extrinsic value, mining Primecoin involves producing chains of prime numbers (Cunningham and bi-twin chains). These are useful to scientists and mathematicians and meet the requirements for a proof of work system of being hard to compute but easy to verify and having an adjustable difficulty.[6][1][4][7][5][8]
Shortly after its launch, some trade journals reported that the rush of over 18,000 new users seeking to mine Primecoin overwhelmed providers of dedicated servers.[1][9] It was ranked as being one of the top ten currencies before 2014.[10]
Primecoin has a block time of one minute, changes difficulty every block, and has a block reward that is a function of the difficulty.[4][8]
Fanning, Kurt; Centers, David P. (13 June 2016). "Blockchain and Its Coming Impact on Financial Services". Journal of Corporate Accounting & Finance. 27 (5): 54–55. doi:10.1002/jcaf.22179.