Which of the following Mersenne Numbers are Mersenne Primes?
A. 2⁴-1=15
B. 2⁶-1=63
C. 2⁷-1=127
D. 2²-1=3
E. 2³-1=7
A. 2⁴-1=15
B. 2⁶-1=63
C. 2⁷-1=127
D. 2²-1=3
E. 2³-1=7