A semiprime number—or a 2-almost prime—is the product of two prime numbers. The numbers 6 = 2x3 and 9 = 3x3 are semiprimes, but 8 = 2x2x2 and 30 = 2x3x5 are not. The semiprimes appear in three of Ramon Villamangca’s “Easy Sequences”: Cody Problems 52859, 52990, and 53740.
Write a function to list the semiprime numbers less than or equal to the input number.
Solve

Solution Stats

49 Solutions

16 Solvers

Last Solution submitted on May 31, 2026

Last 200 Solutions

Solution Comments

Show comments

Problem Recent Solvers16

William Chris Cleveland Riccardo G. Lorenzo

Suggested Problems

More from this Author327

Community Treasure Hunt

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

Start Hunting!