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

• Set some matrix elements to zero

  564 Solvers

• Fermat's Last Theorem - Fermat's conjecture

  101 Solvers

• Rounding off numbers to n decimals

  4811 Solvers

• Sphenic number sequence

  68 Solvers

• Find the sides of an isosceles triangle when given its area and height from its base to apex

  1977 Solvers

More from this Author292

• Compute the effective conductivity of more heterogeneous aquifers

  1 Solvers

• Compute the area of a Q

  6 Solvers

• Trap a knight

  5 Solvers

• Solve an ODE: diffusion problem 2

  5 Solvers

• Solve a Weird Calculator puzzle

  12 Solvers