Problem 896. Sophie Germain prime

In number theory, a prime number p is a Sophie Germain prime if 2p + 1 is also prime. For example, 23 is a Sophie Germain prime because it is a prime and 2 × 23 + 1 = 47, and 47 is also a prime number. These numbers are named after French mathematician Marie-Sophie Germain.

See Sophie Germain prime article on Wikipedia.

In this Problem , the input is a number and you must return true or false if this number is a Sophie Germain prime.

Solve

Solution Stats

49.52% Correct | 50.48% Incorrect
Last Solution submitted on Jan 21, 2026

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers1063

Suggested Problems

More from this Author30

Problem Tags

prime primes sophie germain

Community Treasure Hunt

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

Start Hunting!