Cody

Problems

1 – 50 of 66
 Problem Title Likes Solvers Difficulty

Problem 52293. Palindromic Prime

Created by: Dyuman Joshi

3

9

Problem 248. Twins in a Window

Created by: Ned Gulley

Tags primes

2

131

Problem 47798. Check if the input is a balanced prime

Created by: Mehmet OZC

1

17

Problem 52584. Easy Sequences 9: Faithful Pairs

Created by: Ramon Villamangca

0

4

Problem 51466. List prime anagrams of a number

Created by: ChrisR

1

12

Problem 896. Sophie Germain prime

Created by: Aurelien Queffurust

3

393

Problem 43085. Primes Checker

Created by: Jamil Kasan

8

51

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

Created by: Jesús Zambrano

0

25

Problem 52639. Determine whether a number is unprimeable

Created by: ChrisR

2

6

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

Created by: ChrisR

0

6

Problem 46624. List the emirps

Created by: ChrisR

2

27

Problem 51720. Hoax Numbers

Created by: Dyuman Joshi

Tags primes, numbers

3

11

Problem 46046. Determine whether a number is a cluster prime

Created by: ChrisR

4

14

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

Created by: ChrisR

1

12

Problem 46060. Identify primorial primes

Created by: ChrisR

1

12

Problem 50182. Compute the Euler totient function

Created by: ChrisR

1

8

Problem 52288. List Honaker primes

Created by: ChrisR

2

9

Problem 47808. Check if the input is an interprime

Created by: Mehmet OZC

0

14

Problem 47843. Compute the arithmetic derivative of integers

Created by: ChrisR

0

10

Problem 51798. Label primes with the Erdos-Selfridge classification

Created by: ChrisR

1

5

Problem 2337. Sum of big primes without primes

Created by: Jean-Marie Sainthillier

1

113

Problem 46111. Evaluate the prime zeta function

Created by: ChrisR

1

11

Problem 1298. P-smooth numbers

Created by: Richard Zapor

Tags primes, find, mod

1

60

Problem 46047. Identify Wagstaff primes

Created by: ChrisR

Tags primes

2

23

Problem 47950. Test the generalized Legendre conjecture

Created by: ChrisR

0

10

Created by: goc3

7

411

Problem 1697. Make a Pandiagonal Prime Magic Square: 11 x 11

Created by: Richard Zapor

1

8

Problem 45367. Sieve of Eratosthenes - 02

Created by: Asif Newaz

1

12

Problem 44099. Find my secret function II

Created by: Said BOUREZG

Tags primes

1

20

Problem 47793. Find the smallest prime with n inside

Created by: ChrisR

2

11

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

Created by: ChrisR

0

2

Problem 50948. Identify prime words

Created by: ChrisR

Tags primes, strings

1

6

Problem 1096. Largest Twin Primes

Created by: Des Mc Manus

Tags primes

2

332

Problem 45964. Compute the nth Pythagorean prime

Created by: ChrisR

0

16

Problem 2340. Numbers spiral diagonals (Part 1)

Created by: Jean-Marie Sainthillier

2

117

Problem 241. Project Euler: Problem 7, Nth prime

Created by: Doug Hull

14

750

Problem 46050. Construct a prime circle

Created by: ChrisR

Tags primes

6

12

Problem 46099. Identify full reptend primes

Created by: ChrisR

0

9

Problem 46594. Create a sequence of primes p such that p > n π(p)

Created by: ChrisR

1

9

Problem 52183. List the nth prime quartet prefix

Created by: ChrisR

0

3

Created by: goc3

3

284

Problem 365. Numbers with prime factors 2, 3 and 5.

Created by: elias GR

Tags primes, factors

3

282

Problem 51241. Compute home primes in a given base

Created by: ChrisR

0

4

Problem 42914. Counting the Grand Primes

Created by: John D'Errico

3

37

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

Created by: yurenchu

3

37

Problem 47833. List the delete-a-digit primes

Created by: ChrisR

3

11

Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

54

4252

Problem 43087. Move if I am Optimus Prime

Created by: Jamil Kasan

Tags primes, jokes

8

30

Problem 45994. Investigate the frequency of last digits of prime numbers

Created by: ChrisR

2

10

Problem 46087. Investigate the frequency of last non-zero digits of primorials

Created by: ChrisR

0

7

1 – 50 of 66