70 has factors of 7 x 10
'7' is a Prime number.
10 is a compound ( non-prime number) , because 10 = 2 x 5.
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The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.The greatest common factor of 70, 98, and 154 is 14.
97 is prime.
Since 70 is a factor of 140, it is automatically the GCF.
512 has only one prime factor: 2
The prime factors of 435 are: 3, 5 and 29