List questions from primality-test

Published on 08 Apr 2026 - 21:22

44

Views

Is there a prime number $p$ such that : $p\bmod n =1 $ for $n <10$? and if yes , Are there infinity of them?

Published on 14 Apr 2026 - 11:00

177

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How could factordb apply the p-1-method on this number?

Published on 10 Apr 2026 - 21:07

496

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Primality test for numbers of the form $N=k \cdot 3^n-1$

Published on 21 Apr 2026 - 8:52

113

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Should you use Euler's generalization of fermat's little theorem for primality testing?

Published on 13 Apr 2026 - 5:33

507

Views

Primality test for numbers of the form $N=4 \cdot 3^n-1$

Published on 24 Apr 2026 - 2:13

454

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Primality test for numbers of the form $N=4 \cdot 3^n+1$

Published on 21 Apr 2026 - 0:10

76

Views

Is there an infinity of $k \in \mathbb{N}$ s.t. $2 {k \choose k/2} - 1$ is prime?

Published on 16 Apr 2026 - 4:48

790

Views

Formula to find number of divisors of a number

Published on 13 Apr 2026 - 7:22

246

Views

How to do Lucas Probabilistic Primality Test

Published on 10 May 2026 - 13:46

907

Views

Counterexample to the primality test

Published on 12 Apr 2026 - 9:36

41

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Finding the mistake in a proof of pseudo-primality

Published on 10 May 2026 - 14:55

45

Views

A congruence involving generalized Lucas polynomials

Published on 12 Apr 2026 - 16:33

451

Views

Can my Home PC Handle the Lucas-Lehmer Test by Itself? (or Do I Need GIMPS)

Published on 29 Apr 2026 - 12:50

289

Views

What is the best way to test primality of this number $123456789101112131415161718192021222324252627282931$ for high school level?

Published on 16 Apr 2026 - 18:17

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Help me to understand statistical testing

Is there a prime number $p$ such that : $p\bmod n =1 $ for $n <10$? and if yes , Are there infinity of them?

How could factordb apply the p-1-method on this number?

Primality test for numbers of the form $N=k \cdot 3^n-1$

Should you use Euler's generalization of fermat's little theorem for primality testing?

Primality test for numbers of the form $N=4 \cdot 3^n-1$

Primality test for numbers of the form $N=4 \cdot 3^n+1$

Is there an infinity of $k \in \mathbb{N}$ s.t. $2 {k \choose k/2} - 1$ is prime?

Formula to find number of divisors of a number

How to do Lucas Probabilistic Primality Test

Counterexample to the primality test

Finding the mistake in a proof of pseudo-primality

A congruence involving generalized Lucas polynomials

Can my Home PC Handle the Lucas-Lehmer Test by Itself? (or Do I Need GIMPS)

What is the best way to test primality of this number $123456789101112131415161718192021222324252627282931$ for high school level?

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