Name: Anonymous 2018-10-31 15:53
Any two consecutive numbers, n and n+1, are co-prime
n and n+2 will have a gcd of at most 2, and n/2 and (n+2)/2 are coprime if integer
n and n+x will have a gcd of at most x, or will be factors of x, n/x and (n+x)/x are coprime if integer, and [n/gcd(n,n+x) and n+x /gcd(n,n+x)]
[n/gcd(n,n+x) and n+x], [n and n+x /gcd(n,n+x)] are coprime or have a gcd <= gcd(n,n+x)
n and n+2 will have a gcd of at most 2, and n/2 and (n+2)/2 are coprime if integer
n and n+x will have a gcd of at most x, or will be factors of x, n/x and (n+x)/x are coprime if integer, and [n/gcd(n,n+x) and n+x /gcd(n,n+x)]
[n/gcd(n,n+x) and n+x], [n and n+x /gcd(n,n+x)] are coprime or have a gcd <= gcd(n,n+x)