2013 · Q38
The smallest positive prime (say p) such that 2^p − 1 is not a prime is
Elementary MathematicsNumber System
- A5
- B11
- C17
- D29
Explanation
2^11−1=2047=23×89, composite; smaller primes give Mersenne primes. Answer B.
The smallest positive prime (say p) such that 2^p − 1 is not a prime is
Explanation
2^11−1=2047=23×89, composite; smaller primes give Mersenne primes. Answer B.