Problem 55275. List the semiprimes

• Created by ChrisR
• Appears in Prime Numbers III

×

Like (0)

Difficulty:

(13)

Rate

• Solve Later   
• Add To GroupÂ

A semiprime number—or a 2-almost prime—is the product of two prime numbers. The numbers and are semiprimes, but and 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

35.56% Correct | 64.44% Incorrect

• 45 Solutions
• 13 Solvers

Last Solution submitted on Dec 18, 2024

Last 200 Solutions

Solution Comments

ANNOUNCEMENT ×

Registration Now Open for MathWorks AUTOMOTIVE CONFERENCE 2025

Hello Community, We're excited to announce that registration is now open for the...

Problem Recent Solvers13

Suggested Problems

• Project Euler: Problem 6, Natural numbers, squares and sums.

  2323 Solvers

• Similar Triangles - find the height of the tree

  448 Solvers

• Reindex a vector

  713 Solvers

• Symmetry of vector

  1092 Solvers

• Height of a right-angled triangle

  1867 Solvers

More from this Author292

• List prime anagrams of a number

  19 Solvers

• List ways to reach a target sum

  5 Solvers

• Identify primorial primes

  16 Solvers

• Compute the average precipitation for a watershed using the Thiessen polygon method

  4 Solvers

• List numbers such that every sum of consecutive positive integers ending in those numbers is composite

  7 Solvers