The public key of given user, in an RSA encryption system is e = 57 and n = 3901. What is the value of Euler’s totient function ϕ(n) for calculating the private key of the user?

The public key of given user, in an RSA encryption system is e = 57 an

1.	The public key of given user, in an RSA encryption system is e = 57 and n = 3901. What is the value of Euler’s totient function ϕ(n) for calculating the private key of the user?
A.	4369
B.	3772
C.	871
D.	7892
Answer» C. 871