If B is modular multiplicative inverse of A under mod M where ( A.B=1 mod M ) . Find the exact range of B.
As, B = A^(M-2)%M shouldn’t the range be [0,M-1] ?
Challenges - Number Theory
hello @deep4013
a) the formula that u r using is valid only if M is prime
b) mod inverse cannot be zero because of its definition.
A . B=1 here B can be mod inverse only for range {1…m-1}
it cant be zero becuase A*0 cant be 1 under any condtion
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