Primes
 Usage
• Primes表示素数域，如同 x  Primes.
Notes
• x  Primes 仅对 x是一个数值时进行计算。 • Simplify[expr  Primes]可以用于确定是否一个表达式相应于一个 素数。 • 素数域取为整数域的一个子集。 • PrimeQ[expr]返回False，除非expr明确有头Integer。 • Primes在 TraditionalForm中输出为 .
 Further Examples
This shows that  is not a prime number.
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False was returned because it factors.
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You can also use PrimeQ.
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Here are some simplifications involving prime numbers.
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同时参见 PrimeQ.
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