Cody

# Problems

51 – 100 of 100
 Problem Title Likes Solvers Difficulty

#### Problem 1298. P-smooth numbers

Created by: Richard Zapor

Tags primes, find, mod

1

60

Created by: goc3

7

413

#### 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

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

Created by: Richard Zapor

1

8

#### 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

752

#### 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 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 42914. Counting the Grand Primes

Created by: John D'Errico

3

37

#### 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

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

Created by: Cody Team

Tags primes

13

1471

#### Problem 48075. Play PRIMEGAME

Created by: ChrisR

2

9

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

Created by: ChrisR

4

9

#### Problem 659. How long is the longest prime diagonal?

Created by: Ned Gulley

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

0

4

#### Problem 47895. List the dihedral primes

Created by: ChrisR

2

6

#### Problem 46066. Evaluate the logarithmic integral

Created by: ChrisR

1

12

#### Problem 46582. Find jumping medalists

Created by: ChrisR

3

12

#### Problem 52614. Easy Sequences 12: 50th Prime

Created by: Ramon Villamangca

0

3

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

Created by: ChrisR

2

7

#### Problem 52669. Count the primes in Collatz sequences

Created by: ChrisR

1

5

#### Problem 51758. List Proth primes

Created by: ChrisR

Tags primes

0

4

#### Problem 49783. List the good primes

Created by: ChrisR

Tags primes

1

9

#### Problem 46701. Compute the nth Naerogahtyp emirp

Created by: ChrisR

1

9

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

Created by: James

7

251

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

Created by: Jean-Marie Sainthillier

2

75

Created by: Ned Gulley

Tags primes

8

26

#### Problem 52664. List the Moran numbers

Created by: ChrisR

3

6

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

Created by: Ramon Villamangca

1

4

#### Problem 45429. Prime Sum

Created by: Asif Newaz

0

5

#### Problem 52567. Easy Sequences 7: Easy as Composite Pi

Created by: Ramon Villamangca

0

2

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

Created by: Richard Zapor

0

4

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