210907

Properties

Appears in sequences

• Largest prime p==3 (mod 8) such that Q(sqrt(-p)) has class number 2n+1.at n=17A002149
• 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=34A357600
• Prime numbersat n=18884