Cody

# Problems

1 – 50 of 72
 Problem Title Likes Solvers Difficulty

#### Problem 51466. List prime anagrams of a number

Created by: ChrisR

1

14

#### Problem 52293. Palindromic Prime

Created by: Dyuman Joshi

3

9

#### Problem 47798. Check if the input is a balanced prime

Created by: Mehmet OZC

1

18

#### Problem 3020. Prime Letters = Removing

Created by: Gareth Thomas

Tags primes

0

76

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

Created by: ChrisR

1

8

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

Created by: ChrisR

0

4

#### Problem 896. Sophie Germain prime

Created by: Aurelien Queffurust

3

398

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

Created by: Jesús Zambrano

0

26

#### Problem 43085. Primes Checker

Created by: Jamil Kasan

8

52

#### Problem 51798. Label primes with the Erdos-Selfridge classification

Created by: ChrisR

1

7

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

Created by: ChrisR

1

7

#### Problem 52639. Determine whether a number is unprimeable

Created by: ChrisR

2

7

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

Created by: ChrisR

0

6

#### Problem 51720. Hoax Numbers

Created by: Dyuman Joshi

Tags primes, numbers

3

12

#### Problem 47808. Check if the input is an interprime

Created by: Mehmet OZC

0

16

#### Problem 50182. Compute the Euler totient function

Created by: ChrisR

1

9

#### Problem 46624. List the emirps

Created by: ChrisR

2

28

#### Problem 1298. P-smooth numbers

Created by: Richard Zapor

Tags primes, find, mod

1

63

#### Problem 52288. List Honaker primes

Created by: ChrisR

2

9

#### Problem 50948. Identify prime words

Created by: ChrisR

Tags primes, strings

1

8

#### 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 47843. Compute the arithmetic derivative of integers

Created by: ChrisR

0

13

#### Problem 52584. Easy Sequences 9: Faithful Pairs

Created by: Ramon Villamangca

0

5

#### Problem 46111. Evaluate the prime zeta function

Created by: ChrisR

1

11

#### Problem 46047. Identify Wagstaff primes

Created by: ChrisR

Tags primes

2

23

Created by: goc3

7

413

#### Problem 2337. Sum of big primes without primes

Created by: Jean-Marie Sainthillier

1

121

#### Problem 47950. Test the generalized Legendre conjecture

Created by: ChrisR

0

10

#### 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

13

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

Created by: Richard Zapor

1

8

#### Problem 45964. Compute the nth Pythagorean prime

Created by: ChrisR

0

17

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

Created by: ChrisR

1

6

#### Problem 1096. Largest Twin Primes

Created by: Des Mc Manus

Tags primes

2

338

#### Problem 2340. Numbers spiral diagonals (Part 1)

Created by: Jean-Marie Sainthillier

2

123

#### Problem 52497. Easy Sequences 3: Prime 44-number Squares

Created by: Ramon Villamangca

1

8

#### Problem 241. Project Euler: Problem 7, Nth prime

Created by: Doug Hull

14

790

#### 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 52881. List the cuban primes

Created by: ChrisR

1

6

Created by: goc3

4

290

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

Created by: yurenchu

3

39

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

Created by: elias GR

Tags primes, factors

3

287

#### Problem 47833. List the delete-a-digit primes

Created by: ChrisR

3

13

#### Problem 52183. List the nth prime quartet prefix

Created by: ChrisR

0

5

#### Problem 47518. Play Outside In with primes

Created by: ChrisR

0

5

#### Problem 42914. Counting the Grand Primes

Created by: John D'Errico

3

37

1 – 50 of 72