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Fermat k -Fibonacci and k -Lucas numbers

Jhon J. Bravo, Jose L. Herrera (2020)

Mathematica Bohemica

Using the lower bound of linear forms in logarithms of Matveev and the theory of continued fractions by means of a variation of a result of Dujella and Pethő, we find all k -Fibonacci and k -Lucas numbers which are Fermat numbers. Some more general results are given.

Fermat test with Gaussian base and Gaussian pseudoprimes

José María Grau, Antonio M. Oller-Marcén, Manuel Rodríguez, Daniel Sadornil (2015)

Czechoslovak Mathematical Journal

The structure of the group ( / n ) and Fermat’s little theorem are the basis for some of the best-known primality testing algorithms. Many related concepts arise: Euler’s totient function and Carmichael’s lambda function, Fermat pseudoprimes, Carmichael and cyclic numbers, Lehmer’s totient problem, Giuga’s conjecture, etc. In this paper, we present and study analogues to some of the previous concepts arising when we consider the underlying group 𝒢 n : = { a + b i [ i ] / n [ i ] : a 2 + b 2 1 ( mod n ) } . In particular, we characterize Gaussian Carmichael numbers...

Fermat's Equation in Matrices

Khazanov, Alex (1995)

Serdica Mathematical Journal

The Fermat equation is solved in integral two by two matrices of determinant one as well as in finite order integral three by three matrices.

Fermat’s Little Theorem via Divisibility of Newton’s Binomial

Rafał Ziobro (2015)

Formalized Mathematics

Solving equations in integers is an important part of the number theory [29]. In many cases it can be conducted by the factorization of equation’s elements, such as the Newton’s binomial. The article introduces several simple formulas, which may facilitate this process. Some of them are taken from relevant books [28], [14]. In the second section of the article, Fermat’s Little Theorem is proved in a classical way, on the basis of divisibility of Newton’s binomial. Although slightly redundant in...

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