一、准备工作定义1 若 m_1为正偶数,p-m_1与 p 都是质数,则称(p-m_1,p)为一对兄弟质数,p-m_1称为兄弟质数的前项,又叫弟弟项,p 称为兄弟质数的后项,又叫哥哥项。当 m_1=2时,兄弟质数就是双生质数定义2 不超过非负实数 x 的,兄弟质数的对数或是哥哥项的个数为 X(x)_(m1)相对应之集合记为 First, the definition of the preparatory work 1 If m_1 is even, p-m_1 and p are prime, then (p-m_1, p) is a pair of brother primes, p-m_1 known as the prime of brother prime, also known as brother Item, p is called the brother prime number of the latter, also known as brother item. When m_1 = 2, the brother prime is the definition of the twin prime no more than non-negative real number x, the logarithm of the brother prime or the brother corresponding to the number of X (x) _ (m1) corresponds to the set recorded as