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abromberg/bitcoincreated.py

Last active December 16, 2015 18:48
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Function to determine theoretical number of Bitcoin in existence as a function of the number of days since January 3, 2009, when Bitcoin mining began.
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bitcoincreated.py
from math import floor
def B(t):
max = 21*(10**6) # hard cap on number of BTC
C = 7200 # initial number of BTC produced per day
T = 4*365 # number of days in 4 years
B = sum(C / 2**int(floor(i/T)) for i in range(0, t))
return min(B, max)
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