Problem 55275. List the semiprimes

• Created by ChrisR
• Appears in Prime Numbers III

×

Like (0)

• 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

Problem Recent Solvers13

Suggested Problems

• Find the palindrome

  1638 Solvers

• Space Saver

  486 Solvers

• Lychrel Number Test (Inspired by Project Euler Problem 55)

  102 Solvers

• Orthonormal matrix

  182 Solvers

• N-th Odious

  175 Solvers

More from this Author298

• Compute the Sequence of the Day

  22 Solvers

• Solve an ODE: equidimensional equation

  5 Solvers

• Compute the nth Pythagorean prime

  35 Solvers

• Count the ones in a divisibility matrix

  3 Solvers

• Test the generalized Legendre conjecture

  14 Solvers