in lib/twitter_cldr/formatters/numbers/rbnf/rule_set.rb [139:163]
def lcm(x, y)
x1 = x
y1 = y
p2 = 0
while (x1 & 1) == 0 && (y1 & 1) == 0
p2 += 1
x1 >>= 1
y1 >>= 1
end
t = (x1 & 1) == 1 ? -y1 : x1
while t != 0
t >>= 1 while (t & 1) == 0
t > 0 ? x1 = t : y1 = -t
t = x1 - y1
end
gcd = x1 << p2
x / gcd * y
end