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Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions
3
votes
1
answer
81
views
On composite divisors of certain terms in the extended Lucas sequences
One can easily show that if $p$ is a prime that does not divide $a$, then $a^{p(p-1)}\equiv 1 \pmod{p^2}$.
However, my question is: If instead of $p$ being a prime, it were a pseudoprime to the base $ …
2
votes
1
answer
206
views
On pseudoprimes to the base $a$ (Fermat pseudoprimes)
In 1980, C. Pomerance, J. Selfridge, and S. S. Wagstaff defined a pseudoprime to the base a to be any composite odd $n$ such that $n \mid a^{n-1} - 1$.
More recently, in 2013, S. S. Wagstaff referred …
2
votes
1
answer
218
views
On the computational complexity of Pepin's test
Let $F_{n} = 2^{2^{n}} + 1$, where $n > 0$.
Pepin's Test asserts that $F_{n}$ is prime if and only if $F_{n} \mid 3^{\frac{F_{n} - 1}{2}} + 1$.
QUESTION: What is the big-$\mathcal O$ complexity of thi …