safe primeWiktionary 原文英美/seɪf ˈpraɪm/构词拆解safe词干+prime词干词源说明From safe (adjective) + prime (noun). These primes are called “safe” because they are safe to use in cryptography due to the fact that one less than the prime has the largest possible prime factor.释义名词noun1(number theory) A prime number of the form 2p+1, where p is also a prime (the latter is called a Sophie Germain prime).