57885161

Properties

Appears in sequences

• Mersenne exponents: primes p such that 2^p - 1 is prime. Then 2^p - 1 is called a Mersenne prime.at n=47A000043
• Bisection of A000043.at n=23A099983
• Mersenne prime indices that are not Gaussian primes.at n=28A112634
• Primes p such that 2^p-1 is prime and congruent to 31 mod 5!.at n=27A145040
• Primes p (A000043) such that 2^p-1 is prime (A000668) and congruent to 31 mod 6!.at n=17A145041
• Base-2 logarithm of A136007(n)+1.at n=30A152961
• Isolated primes p such that 2^p-1 is also a prime number.at n=31A161676
• Numbers k such that 3*k-4 and 2^k-1 are prime.at n=19A247147
• Let M_p = 2^p-1 be a Mersenne prime, where p is an odd prime. Sequence lists p such that b_{p-2} == -2^((p+1)/2) mod M_p, where {b_k} is defined in the Comments.at n=22A354168
• Prime numbersat n=3443958