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Omni-MATH / Call an ordered pair (a,b) of positive integers fantastic if and only if a,b≤10⁴ and gcd(a⋅n!−1,a⋅(n+1)!+b)>1 for infinitely many positive integers n. Find the sum of a+b across al… · Discussion

Discussing Call an ordered pair (a,b) of positive integers fantastic if and only if a,b≤10⁴ and gcd(a⋅n!−1,a⋅(n+1)!+b)>1 for infinitely many positive integers n. Find the sum of a+b across al… · Omni-MATH

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