# Problems

1 – 20 of 20
 Problem Title Likes Solvers Difficulty

#### Problem 896. Sophie Germain prime

Created by: Aurelien Queffurust

3

467

#### Problem 2736. Pernicious Anniversary Problem

Created by: Jan Orwat

12

786

#### Problem 248. Twins in a Window

Created by: Ned Gulley

Tags primes

2

140

#### Problem 44384. Find the nearest prime number

Created by: Matthew Eicholtz

7

610

#### Problem 44230. I'm going to enjoy watching you calculate, Mr Anderson

Created by: James

2

37

#### Problem 44385. Extra safe primes

Created by: Matthew Eicholtz

11

708

Created by: goc3

1

64

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

Created by: Jean-Marie Sainthillier

3

156

#### Problem 1204. Prime Time

Created by: James

2

61

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

Created by: yurenchu

3

51

Created by: goc3

5

364

#### Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

7

144

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

57

4826

#### Problem 64. The Goldbach Conjecture, Part 2

Created by: Cody Team

Tags primes

16

1933

#### Problem 1672. Leftovers? Again?!

Created by: James

4

23

#### Problem 83. Prime factor digits

Created by: Cody Team

Tags primes

21

1770

#### Problem 1095. Circular Primes (based on Project Euler, problem 35)

Created by: James

7

296

#### Problem 2342. Numbers spiral diagonals (Part 2)

Created by: Jean-Marie Sainthillier

2

109

#### Problem 1394. Prime Ladders

Created by: Ned Gulley

Tags primes

8

36

#### Problem 44377. Five steps to enlightenment

Created by: Alfonso Nieto-Castanon

6

38

1 – 20 of 20