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2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71

that's as far up as it goes because 72 is a composite number not a Prime number!

Q: What are the prime numbers up to 72?

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The prime factors of 72 are: 2 and 3.

"The" co-prime number is wrong; for any number, there are infinitely other numbers that are co-prime with it, not just one. Get the prime factors for 72. Then, any number made up of factors that DON'T include those prime factors is co-prime with 72. For example, 49 (which is 7 x 7), or 35 (5 x 7) are coprime with 72, since neither 5 nor 7 are among the prime factors of 72.

there are 12 prime numbers between 21 and 72 23, 29, 31, 37, 41, 43, 47, 49, 53, 59, 61, 67

there are many (infinite) ways but just one is 72=2*(31+5)

98 is an even number, thus it is divisible by 2; 98/2 = 49. 49 is simply 72. Since both 2 and 7 are prime numbers, the prime factorization of 98 is 2 X 72.

Related questions

67 and 5

67 and 5

The prime factors of 72 are: 2 and 3.

No, 72 and 252 are not relatively prime. No pair of even numbers can be relatively prime.

73 is prime.

Negative numbers don't have prime factorizations.

54 and 72 are divisible by 2,3.

"The" co-prime number is wrong; for any number, there are infinitely other numbers that are co-prime with it, not just one. Get the prime factors for 72. Then, any number made up of factors that DON'T include those prime factors is co-prime with 72. For example, 49 (which is 7 x 7), or 35 (5 x 7) are coprime with 72, since neither 5 nor 7 are among the prime factors of 72.

2 and 3

67 and 5

72 = 8 x 9 = 23 x 32

The Fundamental Theorem of Arithmetic states that every number has exactly one, unique factorization of potentially non-unique prime numbers. Since the prime factorization of 72 is 2*2*2*3*3, we conclude that 72 is coprime with all other prime numbers, so there is no solution.