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Conor Grogan's user avatar
Conor Grogan's user avatar
Conor Grogan
  • Member for 1 year, 2 months
  • Last seen more than 1 year ago
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revised
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?
added 169 characters in body
comment
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?
I ran sympy.factorint on a i9-13900k for the 5789 digit number n=2017 and it only returned 1 and the number
comment
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?
I tried - wasn't able to add a comment due to my account being new.
awarded
 Teacher
revised
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?
added 56 characters in body
revised
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?
deleted 5884 characters in body
awarded
 Editor
revised
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?
edited body
answered
Is $\sum_{k=1}^{n}\frac{(n-1)!}{(k-1)!}$ composite for $n\geq 4$?