Problems

1 – 50 of 120

Problem Title Likes Solvers Difficulty

Problem 55170. Find all prime factors of the input

Created by: Pisces

Tags primes

Tags primes

Problem 54900. Find the number of primes leq than input

Created by: Susan

Tags primes

Problem 52397. Find the nth composite number.

Created by: Apurbo Roy Chowdhury

Tags primes, nthprime

Problem 47803. Check if the input is a strong prime

Created by: Mehmet OZC

Tags primes, number theory, strong prime

Problem 42483. Give prime Numbers upto n

Created by: Manish Kapgate

Tags primes

Problem 2335. Find the number that has most primes those less than it

Created by: Huy

Tags primes, vector

Problem 46054. Count trailing zeros in a primorial

Created by: ChrisR

Tags primes, number theory, primorial

Problem 46848. Modulo of sum of square of first n primes with 24

Created by: Mayank Bajpai

Tags primes, modulo, linear pattern

Problem 44266. Sort the prime numbers in each row of a matrix

Created by: Loris Chavée

Tags primes, sorting, matrix

Problem 49738. Determine whether a prime is Pythagorean

Created by: ChrisR

Tags primes, pythagoras, number theory

Problem 2411. Largest Prime Number

Created by: Vinod Sudheesh

Tags primes

126

Problem 1375. select the primes of a vector

Created by: S AY

Tags primes, test, poor_test_suite

268

Problem 44284. Given a number N, find the smallest prime P>N

Created by: AMITAVA BISWAS

Tags primes

Problem 50038. Number Puzzles - 014

Created by: Doddy Kastanya

Tags primes, puzzles

Problem 45543. Find the remainder with the factorial of PRIMES?

Created by: Muhammad Usman

Tags primes, loop, numbers

Problem 42704. prime to each other

Created by: George-Felix Leu

Tags primes

Problem 42513. Is it prime?

Created by: Azhar

Tags primes, basic matlab, basics

117

Problem 44098. Find my secret function I

Created by: Said BOUREZG

Tags primes

Problem 42749. Find the nearest prime

Created by: Pooja Narayan

Tags math, primes

Problem 44861. Ratio between sums of prime and non-prime numbers

Created by: Jesús Zambrano

Tags primes, ratio

Problem 47798. Check if the input is a balanced prime

Created by: Mehmet OZC

Tags primes, number theory, balanced prime

Problem 49733. Solve the arithmetic differential equation D(n) = n

Created by: ChrisR

Tags primes, integers, arithmetic derivative integers

Problem 896. Sophie Germain prime

Created by: Aurelien Queffurust

Tags prime, primes, sophie germain

458

Problem 43269. Get all prime factors

Created by: Jamil Kasan

Tags primes, factorization

470

Problem 50933. Find pairs of primes with the same digit sum

Created by: ChrisR

Tags primes, digit sum

Problem 51198. Find pairs of primes with the same digit sum and a specified separation

Created by: ChrisR

Tags primes, sequence, digit sum

Problem 51466. List prime anagrams of a number

Created by: ChrisR

Tags primes, permutations, anagram

Problem 51798. Label primes with the Erdos-Selfridge classification

Created by: ChrisR

Tags primes, number theory, guy a18

Problem 52293. Palindromic Primes

Created by: Dyuman Joshi

Tags primes, palindrome

Problem 248. Twins in a Window

Created by: Ned Gulley

Tags primes

135

Problem 46624. List the emirps

Created by: ChrisR

Tags sequences, primes

Problem 47808. Check if the input is an interprime

Created by: Mehmet OZC

Tags primes, number theory, interprime

Problem 3020. Prime Letters = Removing

Created by: Gareth Thomas

Tags primes

Problem 43085. Primes Checker

Created by: Jamil Kasan

Tags primes, variable input

Problem 45367. Sieve of Eratosthenes - 02

Created by: Asif Newaz

Tags primes, sequence, algorithm

Problem 46057. Find the last non-zero digit in a primorial

Created by: ChrisR

Tags primes, number theory, primorial

Problem 46111. Evaluate the prime zeta function

Created by: ChrisR

Tags primes, zeta function

Problem 44862. Ratio between sum of primes and sum of factors

Created by: Jesús Zambrano

Tags primes, factors, ratio

Problem 50182. Compute the Euler totient function

Created by: ChrisR

Tags primes, number theory

Problem 51720. Hoax Numbers

Created by: Dyuman Joshi

Tags primes, numbers

Problem 50948. Identify prime words

Created by: ChrisR

Tags primes, strings

Problem 46046. Determine whether a number is a cluster prime

Created by: ChrisR

Tags primes, number theory

Problem 52288. List Honaker primes

Created by: ChrisR

Tags primes, digit sum

Problem 1298. P-smooth numbers

Created by: Richard Zapor

Tags primes, find, mod

Problem 44099. Find my secret function II

Created by: Said BOUREZG

Tags primes

Problem 47843. Compute the arithmetic derivative of integers

Created by: ChrisR

Tags primes, integers, arithmetic derivative

1 – 50 of 120

Difficulty Rating

Problem Groups

Problems