The Prime Directive

Average Problem Difficulty:

Time to get your Number Theory on. These are all problems related to prime numbers in one way or another.

Community Group Solver

+50 points

Problem Title	Likes	Solvers
Problem 44384. Find the nearest prime number Created by: Matthew Eicholtz Tags prime numbers, cody5	8	640
Problem 44385. Extra safe primes Created by: Matthew Eicholtz Tags prime numbers, cody5, safe prime	12	741
Problem 83. Prime factor digits Created by: Cody Team Tags primes	26	2390
Problem 3016. Twin Primes Created by: goc3 Tags prime, integer, sequence	1	86
Problem 248. Twins in a Window Created by: Ned Gulley Tags primes	2	157
Problem 60. The Goldbach Conjecture Created by: Cody Team Tags primes	59	5779
Problem 64. The Goldbach Conjecture, Part 2 Created by: Cody Team Tags primes	18	2369
Problem 44403. Goldbach's marginal conjecture - Write integer as sum of three primes Created by: yurenchu Tags primes, goldbach conjecture	3	67
Problem 896. Sophie Germain prime Created by: Aurelien Queffurust Tags prime, primes, sophie germain	4	905
Problem 2910. Mersenne Primes vs. All Primes Created by: goc3 Tags primes, comparison, powers	7	723
Problem 1095. Circular Primes (based on Project Euler, problem 35) Created by: James Tags primes, projecteuler, circular reasoning	9	570
Problem 2342. Numbers spiral diagonals (Part 2) Created by: Jean-Marie Sainthillier Tags primes, project euler, spiral	4	157
Problem 2736. Pernicious Anniversary Problem Created by: Jan Orwat Tags easy, sequences, oeis	13	823
Problem 1394. Prime Ladders Created by: Ned Gulley Tags primes	10	49

ANNOUNCEMENT

Hello Community, We're excited to announce that registration is now open for the...

	Michael McCarthy submitted Solution 14596833 to Problem 44384. Find the nearest prime number 18 hours and 26 minutes ago
	Paul Bower submitted Solution 14576959 to Problem 1394. Prime Ladders on 16 Mar 2025 at 17:51
	Paul Bower submitted Solution 14576959 to Problem 1394. Prime Ladders on 16 Mar 2025 at 17:51
	Suraj submitted Solution 14558921 to Problem 44385. Extra safe primes on 25 Feb 2025
	Suraj submitted Solution 14558918 to Problem 248. Twins in a Window on 25 Feb 2025

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