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2.31.11Inverse in ℤ/pℤ : inv inverse or /

To compute the inverse of an integer n in ℤ/pℤ, input 1/n%p or inv(n%p) or inverse(n%p).
Input :

inv(3%13)

Output :

-4%13

Indeed 3−4=−12=1 (mod 13).


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