totient function by *yuko*

for i=1e4to 103e2k=i:n=i:for j=2to i:if mod(k,j)goto 1
2k=k/j:if!mod(k,j)goto 2
n=n-n/j
1next:?n:next

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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