There are many, many more odd prime numbers than even prime numbers; there is only 1 even Prime number, namely 2, whereas the odd prime numbers are 3, 5, 7, 11, ...
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There are infinite prime numbers as there is infinite numbers. You cannot limit the counting of primes.
Odd. There is only 1 prime number in the even group: 2. This is because all even numbers above 2 have at least three factors: 1, 2, and itself. There are many odd prime numbers: 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 41, 43, 47, 53, 59...
16 prime numbers
15 prime numbers
Infinitely many numbers are relatively prime to 37. Because 37 is a prime number, all other numbers are relatively prime to it.