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Posts tagged modular-arithmetic

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Q&A Find all functions \(f:\mathbb N\to\mathbb N\) such that for all primes \(p\), \(p\mid f(a)^{f(p)}-f(b)^p\iff p\mid a-b\)

0 answers · posted 9mo ago by TheCodidacter, or rather ACodidacter‭ · edited 9mo ago by TheCodidacter, or rather ACodidacter‭

Question functions solution-verification modular-arithmetic

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Q&A All numbers are triangular modulo $N$ iff $N$ is a power of $2$?

1 answer · posted 11mo ago by celtschk‭ · last activity 11mo ago by Peter Taylor‭

Question modular-arithmetic

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Q&A Closed-form expression for sum of Modulo Arithmetic Progression

1 answer · posted 2y ago by theabbie‭ · edited 2y ago by trichoplax‭

Question formula summation sequence modular-arithmetic

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Q&A Show that $\forall n \in \mathbb{Z}^{+}$, $25^n \equiv 25 \bmod{100}$.

2 answers · posted 2y ago by Carefree Explorer‭ · edited 2y ago by Peter Taylor‭

Question number-theory recreational-mathematics modular-arithmetic