List questions from fermat-numbers

Published on 25 Jan 2018 - 17:34

149

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A question about proving distinct Fermat numbers are relatively prime

Published on 26 Jan 2018 - 5:28

67

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On the equation $\varphi(2+\varphi(x))=2^{y-1}$, where $\varphi(n)$ denotes the Euler's totient function

Published on 04 Feb 2018 - 11:25

430

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Show that all Fermat numbers pass the base $2$ test (pseudoprime).

Published on 21 Mar 2018 - 16:37

92

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On miscellaneous questions about perfect numbers III

Published on 22 Feb 2026 - 19:55

1.5k

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Easiest way to check whether the number is prime or not

Published on 25 Apr 2018 - 18:12

68

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how can I prove that 29341 is not a prime number, with Fermat

Published on 26 Apr 2018 - 11:57

42

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Prove $n\geq 3$ is prime or that the largest non-trivial factor of $n$ is at least $3\sqrt{n}$

Published on 01 May 2018 - 15:16

31

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Nature of the prime factors of generalised Fermat numbers

Published on 08 May 2018 - 11:45

779

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Is my proof correct on how $k$ must be a power of $2$? Are there other proofs?

Published on 24 May 2018 - 11:44

104

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Show that $\pi\left(n\right)\geq\log_{2}\left(\log_{2}\left(n-1\right)\right)$

Published on 28 Jun 2018 - 11:21

209

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Nontrivial integer solutions of $ a^3+b^3=c^3+d^3$

Published on 15 Jul 2018 - 22:40

80

Views

Primes from Generalised Fermat Numbers

Published on 10 Aug 2018 - 14:30

81

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Generating prime factors of a certain congruence?

Published on 10 Oct 2018 - 10:31

1.7k

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Proving $a^{n-1} \equiv 1 \mod n $ when n is not prime.

Published on 07 Nov 2018 - 15:10

List Question

towers of 2 and primes, generation s of big primes by iteration of the function $2^{x}$

A question about proving distinct Fermat numbers are relatively prime

On the equation $\varphi(2+\varphi(x))=2^{y-1}$, where $\varphi(n)$ denotes the Euler's totient function

Show that all Fermat numbers pass the base $2$ test (pseudoprime).

On miscellaneous questions about perfect numbers III

Easiest way to check whether the number is prime or not

how can I prove that 29341 is not a prime number, with Fermat

Prove $n\geq 3$ is prime or that the largest non-trivial factor of $n$ is at least $3\sqrt{n}$

Nature of the prime factors of generalised Fermat numbers

Is my proof correct on how $k$ must be a power of $2$? Are there other proofs?

Show that $\pi\left(n\right)\geq\log_{2}\left(\log_{2}\left(n-1\right)\right)$

Nontrivial integer solutions of $ a^3+b^3=c^3+d^3$

Primes from Generalised Fermat Numbers

Generating prime factors of a certain congruence?

Proving $a^{n-1} \equiv 1 \mod n $ when n is not prime.

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