Any number that is not a multiple of 2 or 3.
The first few are: 5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 35, 37, 41, 43, 47, 49, 53, 55
Also, it may be of interest to note that adding or subtracting 1 also yields such a number. (In this case, 287 and 289).
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coprime numbers with 18 are : 17 and 19.
9 (factors 1, 3, and 9) and 10 (factors 1, 2, 5, and 10) are coprime numbers. Numbers are coprime (also called relatively prime) if 1 is their only common factor.
All pairs of two primes are coprime. There are fifteen primes under 50. So that means there are 105 unique pairs of "coprime primes", or more generally, pairs of primes, under 50.
1,2,3,4.6,8,9,12,16,18,24,32,36,48,72,96,144,288. Are the factors of 288