Cody

Problems

51 – 100 of 100
Problem Title
Likes
Solvers
Difficulty

Problem 46047. Identify Wagstaff primes

Created by: ChrisR

Tags primes

2

23

Problem 44305. 5 Prime Numbers

Created by: goc3

Tags prime, primes, string

7

413

Problem 47950. Test the generalized Legendre conjecture

Created by: ChrisR

Tags primes, conjecture

0

10

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

Created by: Richard Zapor

Tags primes, magic square, pandiagonal

1

8

Problem 45367. Sieve of Eratosthenes - 02

Created by: Asif Newaz

Tags primes, sequence, algorithm

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

Tags primes, strings, sequence

2

11

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

Created by: ChrisR

Tags primes, integers, arithmetic derivative integers

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

Tags primes, pythagoras, number theory

0

16

Problem 2340. Numbers spiral diagonals (Part 1)

Created by: Jean-Marie Sainthillier

Tags primes, project euler, spiral

2

117

Problem 241. Project Euler: Problem 7, Nth prime

Created by: Doug Hull

Tags primes, projecteuler

14

754

Problem 46050. Construct a prime circle

Created by: ChrisR

Tags primes

6

12

Problem 46099. Identify full reptend primes

Created by: ChrisR

Tags primes, number theory

0

9

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

Created by: ChrisR

Tags primes, sequence

1

9

Problem 52183. List the nth prime quartet prefix

Created by: ChrisR

Tags primes, convolution, sequence

0

3

Problem 2910. Mersenne Primes vs. All Primes

Created by: goc3

Tags primes, comparison, powers

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

Tags primes, sequence, base conversion

0

4

Problem 42914. Counting the Grand Primes

Created by: John D'Errico

Tags prime, primes, intersect

3

37

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

Created by: yurenchu

Tags primes, goldbach conjecture

3

37

Problem 47833. List the delete-a-digit primes

Created by: ChrisR

Tags sequences, primes

3

11

Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

54

4253

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

Tags primes, number theory

2

10

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

Created by: ChrisR

Tags primes, number theory, primorial

0

7

Problem 64. The Goldbach Conjecture, Part 2

Created by: Cody Team

Tags primes

13

1471

Problem 48075. Play PRIMEGAME

Created by: ChrisR

Tags primes, sequence, conway

2

9

Problem 49778. Determine whether a number is a prime self number

Created by: ChrisR

Tags primes, kaprekar

4

9

Problem 659. How long is the longest prime diagonal?

Created by: Ned Gulley

Tags primes, spiral, diagonal

12

355

Problem 83. Prime factor digits

Created by: Cody Team

Tags primes

16

1090

Problem 47518. Play Outside In with primes

Created by: ChrisR

Tags primes, puzzle, sequence

0

4

Problem 47895. List the dihedral primes

Created by: ChrisR

Tags primes, sequence, symmetry

2

6

Problem 46066. Evaluate the logarithmic integral

Created by: ChrisR

Tags primes, number theory, special functions

1

12

Problem 49783. List the good primes

Created by: ChrisR

Tags primes

1

9

Problem 46582. Find jumping medalists

Created by: ChrisR

Tags primes, sorting, number theory

3

12

Problem 46701. Compute the nth Naerogahtyp emirp

Created by: ChrisR

Tags primes, pythagoras

1

9

Problem 52614. Easy Sequences 12: 50th Prime

Created by: Ramon Villamangca

Tags easy, sequences, primes

0

3

Problem 52669. Count the primes in Collatz sequences

Created by: ChrisR

Tags primes, sequence, another collatz problem

1

5

Problem 51077. List composite numbers that cannot be written as the sum of two primes

Created by: ChrisR

Tags primes, number theory, sequence

2

7

Problem 51758. List Proth primes

Created by: ChrisR

Tags primes

0

4

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

Created by: James

Tags primes, projecteuler, circular reasoning

7

251

Problem 2342. Numbers spiral diagonals (Part 2)

Created by: Jean-Marie Sainthillier

Tags primes, project euler, spiral

2

75

Problem 1394. Prime Ladders

Created by: Ned Gulley

Tags primes

8

26

Problem 52664. List the Moran numbers

Created by: ChrisR

Tags primes, sequence, digit sum

3

6

Problem 52574. Easy Sequences 8: Triangles with integer sides and prime perimeters

Created by: Ramon Villamangca

Tags easy, sequences, primes

1

4

Problem 45429. Prime Sum

Created by: Asif Newaz

Tags primes, projecteuler, euler

0

5

Problem 52567. Easy Sequences 7: Easy as Composite Pi

Created by: Ramon Villamangca

Tags easy, sequences, primes

0

2

Problem 1688. Prime Sequences: AP-k Minimum Final Value

Created by: Richard Zapor

Tags primes, isprime, primorial

0

4
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