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Q: Is 2 x 3 x 5 x 7 plus 5 a prime number?

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It is may be prime only if one term is 2. for example: 3+2=5But one term may be 2 and the result composite: 7+2=9=3*3

22 + 3 = 7 Since 2 is the only even prime number, this is the only number for which this holds true.

The number 27 has a cube root of 3, which is 2 (the smallest prime) plus 1.

x = 2 : 2 and 3 are both primes.

648 is not prime. 648 = 2 * 2 * 2 * 3 * 3 * 3 * 3

216 is not prime. 216 = 2 * 2 * 2 * 3 * 3 * 3

2 + 3 = 5 Two plus any odd prime number is odd.

2. 2 + 3 = 5 Or if you mean like add 3 to the prime number, then add that to the prime? 2 still works!! 2: 2 + 3 = 5. 5 + 2 = 7

144 is not prime. 144 = 2 * 2 * 2 * 2 * 3 * 3

2 x 3 x 5 + 1 = 31

No. The lowest prime number is 2.

Yes 2 and 3 are prime factors of 24 because; 2 is a prime number and fits in to 24 3 is a prime number and fits into 24

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