Cody

Problems

1 – 50 of 93
Problem Title
Likes
Solvers
Difficulty

Problem 52293. Palindromic Primes

Created by: Dyuman Joshi

Tags primes, palindrome

3

14

Problem 43269. Get all prime factors

Created by: Jamil Kasan

Tags primes, factorization

6

517

Problem 42749. Find the nearest prime

Created by: Pooja Narayan

Tags math, primes

1

93

Problem 47798. Check if the input is a balanced prime

Created by: Mehmet OZC

Tags primes, number theory, balanced prime

2

26

Problem 1761. Primes Faster for Large N

Created by: Richard Zapor

Tags primes, find, logical

1

48

Problem 248. Twins in a Window

Created by: Ned Gulley

Tags primes

2

145

Problem 47808. Check if the input is an interprime

Created by: Mehmet OZC

Tags primes, number theory, interprime

1

20

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

Created by: Jesús Zambrano

Tags primes, factors, ratio

0

29

Problem 3020. Prime Letters = Removing

Created by: Gareth Thomas

Tags primes

0

88

Problem 51466. List prime anagrams of a number

Created by: ChrisR

Tags primes, permutations, anagram

1

18

Problem 42704. prime to each other

Created by: George-Felix Leu

Tags primes

1

55

Problem 46624. List the emirps

Created by: ChrisR

Tags sequences, primes

2

39

Problem 44099. Find my secret function II

Created by: Said BOUREZG

Tags primes

1

22

Problem 44098. Find my secret function I

Created by: Said BOUREZG

Tags primes

2

29

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

Created by: ChrisR

Tags primes, digit sum

1

10

Problem 43085. Primes Checker

Created by: Jamil Kasan

Tags primes, variable input

8

58

Problem 1298. P-smooth numbers

Created by: Richard Zapor

Tags primes, find, mod

1

79

Problem 45367. Sieve of Eratosthenes - 02

Created by: Asif Newaz

Tags primes, sequence, algorithm

2

17

Problem 50182. Compute the Euler totient function

Created by: ChrisR

Tags primes, number theory

1

9

Problem 50948. Identify prime words

Created by: ChrisR

Tags primes, strings

2

14

Problem 46046. Determine whether a number is a cluster prime

Created by: ChrisR

Tags primes, number theory

4

16

Problem 46060. Identify primorial primes

Created by: ChrisR

Tags primes, number theory, primorial

1

14

Problem 46111. Evaluate the prime zeta function

Created by: ChrisR

Tags primes, zeta function

1

14

Problem 54755. List odd twin composites

Created by: ChrisR

Tags primes, number theory, sequence

1

5

Problem 51720. Hoax Numbers

Created by: Dyuman Joshi

Tags primes, numbers

3

15

Problem 51798. Label primes with the Erdos-Selfridge classification

Created by: ChrisR

Tags primes, number theory, guy a18

2

12

Problem 51312. Count the square-full divisors of a number

Created by: ChrisR

Tags primes, number theory, sequence

0

7

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

Created by: ChrisR

Tags primes, integers, arithmetic derivative integers

0

10

Problem 43087. Move if I am Optimus Prime

Created by: Jamil Kasan

Tags primes, jokes

8

34

Problem 52288. List Honaker primes

Created by: ChrisR

Tags primes, digit sum

2

12

Problem 896. Sophie Germain prime

Created by: Aurelien Queffurust

Tags prime, primes, sophie germain

3

636

Problem 52639. Determine whether a number is unprimeable

Created by: ChrisR

Tags primes, project euler

3

14

Problem 47950. Test the generalized Legendre conjecture

Created by: ChrisR

Tags primes, conjecture

0

13

Problem 45964. Compute the nth Pythagorean prime

Created by: ChrisR

Tags primes, pythagoras, number theory

1

25

Problem 56190. Split Even Number Into Two Primes

Created by: Ben Placek

Tags math, primes

4

138

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

Created by: ChrisR

Tags primes, number theory, primorial

1

14

Problem 52956. Compute the largest number whose prime factors sum to n

Created by: ChrisR

Tags primes, sequence, integer complexity

1

6

Problem 55275. List the semiprimes

Created by: ChrisR

Tags primes, number theory, sequence

0

8

Problem 56308. Korselt's Criterion

Created by: HH

Tags primes, number theory, carmichael

1

6

Problem 58018. List the Fermi-Dirac primes

Created by: ChrisR

Tags primes, number theory

2

4

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

Created by: ChrisR

Tags primes, sequence, digit sum

1

12

Problem 44305. 5 Prime Numbers

Created by: goc3

Tags prime, primes, string

7

430

Problem 46047. Identify Wagstaff primes

Created by: ChrisR

Tags primes

2

28

Problem 47843. Compute the arithmetic derivative of integers

Created by: ChrisR

Tags primes, integers, arithmetic derivative

0

19

Problem 47793. Find the smallest prime with n inside

Created by: ChrisR

Tags primes, strings, sequence

3

16

Problem 2337. Sum of big primes without primes

Created by: Jean-Marie Sainthillier

Tags primes, project euler, eratosthenes

3

133

Problem 52584. Easy Sequences 9: Faithful Pairs

Created by: Ramon Villamangca

Tags easy, sequences, primes

1

16

Problem 44403. Goldbach's marginal conjecture - Write integer as sum of three primes

Created by: yurenchu

Tags primes, goldbach conjecture

3

57

Problem 52881. List the cuban primes

Created by: ChrisR

Tags primes, project euler, sequence

1

8

Problem 2340. Numbers spiral diagonals (Part 1)

Created by: Jean-Marie Sainthillier

Tags primes, project euler, spiral

3

178
1 – 50 of 93