Problem 1298. P-smooth numbers

This Challenge is to find P-smooth number partial sets given P and a max series value.

A P-smooth number set of N contains a subset of 1:N integers whose prime factors are all <=P.

For P=3 and N=16: P-smooth subset is [1 2 3 4 6 8 9 12 16]. Values 5,7,10,13,14,and 15 are primes >3 or values divisible by primes>3.

vs = find_psmooth(P,N)

Sample OEIS 11-smooth numbers

Where are P-smooth numbers utilized or present themselves? Upcoming Challenge solved by P-smooth numbers.

Solve

Solution Stats

77.37% Correct | 22.63% Incorrect
Last Solution submitted on Dec 28, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers94

Suggested Problems

More from this Author308

Problem Tags

arrayfun find mod oeis primes

Community Treasure Hunt

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

Start Hunting!