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 May 2 awarded Popular Question Apr 11 awarded Notable Question Mar 28 awarded Popular Question Mar 10 awarded Notable Question Mar 9 awarded Nice Question Jan 23 awarded Notable Question Dec 27 awarded Nice Question Oct 30 awarded Popular Question Sep 30 awarded Popular Question Aug 24 accepted Prove that the only numbers not expressible as a sum of consecutive positive integers takes the form $2^n$ for some $n \in \mathbb N$ Aug 24 comment Prove that the only numbers not expressible as a sum of consecutive positive integers takes the form $2^n$ for some $n \in \mathbb N$ Fixed thanks @MarkBennet. Could you elaborate on why writing this odd factor as a sum of consecutive integers helps me? As in the comment below I'm having trouble seeing where this gets me. Aug 24 revised Prove that the only numbers not expressible as a sum of consecutive positive integers takes the form $2^n$ for some $n \in \mathbb N$ edited title Aug 24 comment Prove that the only numbers not expressible as a sum of consecutive positive integers takes the form $2^n$ for some $n \in \mathbb N$ Sorry, I'm not sure I understand why writing $x = (m+(m+1)) \cdot 2^\alpha$ (if $x$ has one odd factor) helps me... Aug 24 asked Prove that the only numbers not expressible as a sum of consecutive positive integers takes the form $2^n$ for some $n \in \mathbb N$ Jul 25 awarded Notable Question Jul 11 awarded Notable Question Jun 29 awarded Yearling Jun 6 awarded Popular Question Apr 18 awarded Notable Question Apr 13 awarded Famous Question