133387

Properties

Appears in sequences

• Largest prime p==3 (mod 8) such that Q(sqrt(-p)) has class number 2n+1.at n=15A002149
• Largest squarefree number k such that Q(sqrt(-k)) has class number n.at n=30A038552
• Primes of form prime(1) + ... + prime(k) + 1.at n=29A053845
• Primes p such that the p-1 digits of the binary expansion of k/p (for k=1,2,3,...,p-1) fit into the k-th row of a magic square grid of order p-1.at n=27A096339
• Numbers n such that the sum of the inverse of the exponents in the binary expansion of 2n is an integer.at n=15A272035
• Largest number k such that C(-k) is the cyclic group of order n, where C(D) is the class group of the quadratic field with discriminant D; or 0 if no such k exists.at n=30A357600
• Prime numbersat n=12449