Problem 46047. Identify Wagstaff primes

Created by ChrisR

Solve Later

The numbers 3, 43, and 2731 are examples of Wagstaff primes.

Write a function to identify Wagstaff primes in the input.

Solve

Solution Stats

265 Solutions
44 Solvers

Last Solution submitted on Nov 13, 2025

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

William on 18 Jul 2020

I think the answer to problem 7 should be [0 1 1 1 1 1 1 1 1 0 1 0], because q=31 leads to a Wagstaff prime.

ChrisR on 18 Jul 2020

Yes, you're right. Thanks, William. I've corrected the test suite. I should have known there was a problem because Athi's solution stepped around 31.

Solution Comments

Show comments

Problem Recent Solvers44

Suggested Problems

What is the distance from point P(x,y) to the line Ax + By + C = 0?

547 Solvers
Angle between Two Vectors

516 Solvers
Getting the indices from a vector

11236 Solvers
Magic is simple (for beginners)

10592 Solvers
Remove element(s) from cell array

1872 Solvers

More from this Author314

List the cuban primes

17 Solvers
Count trailing zeros in a primorial

56 Solvers
List numbers that are not in the Fibonacci sequence

8 Solvers
Compute an integral of a product of sinusoids

9 Solvers
Find primes and integers that solve an equation

8 Solvers

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!