It is known that B and P are natural numbers greater than 1, and P+2B, P+4B, P+6B, P+8B, P+10B are all prime numbers, find the minimum value of P+B.
已知B与P是大于1的自然数，且P+2B，P+4B，P+6B，P+8B，P+10B都是质数，求P+B的最小值．
<result>7</result>