2 is the only prime even number. Why? Because the prime numbers can be divided only with 1 and with the same number. So, 2 can be divided only with 2 and 1. That is enough to make
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A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
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2 is the only even prime number because all of the other even numbe...
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Because a Prime number is only divisible by 1 and itself. 2 is low enough to qualify for that rule. All other even numbers are divisible by 2.
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