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Jean-Marie Sainthillier


Skinexigence

Last seen: 2 days ago Active since 2012

Spoken Languages:
English, French

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  • Treasure Hunt Participant
  • Thankful Level 1
  • First Answer
  • Word Puzzles Master
  • Likeable
  • Indexing V Master
  • Strings III Master
  • Community Group Solver
  • Matrix Patterns III Master
  • Draw Letters
  • Project Euler I
  • Number Manipulation I Master

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Solved


Find the nth composite number.
Everyone heard about the nth prime number. Let's try to find out the nth composite. For example , 1 is the first composite, 10 i...

6 days ago

Solved


Consecutive Prime Numbers

6 days ago

Solved


Concatenated Consecutive Prime

10 days ago

Solved


Hoax Numbers
A Hoax Number (OEIS A019506) is defined as a composite number, whose sum of digits is equal to the sum of digits of its distinct...

11 days ago

Solved


List the good primes

13 days ago

Solved


List Proth primes

17 days ago

Solved


List the nth prime quartet prefix
Prime numbers larger than 5 can end only in 1, 3, 7, or 9, but of course not all numbers ending in these four digits are prime. ...

17 days ago

Solved


Count the primes in Collatz sequences
Several Cody problems (21, 69, 42937, 44448, 44784, 52422) involve Collatz sequences. These start with a seed . If is odd, the ...

17 days ago

Solved


Area-01
Given the radius of the circle inscribed in a square, find the area that is not bounded by the circle but inside the square. ...

3 months ago

Solved


Create array of all Distances between two Sets of Points
This Challenge is a subsection of Martian Pranks based on Tim's efficient Distance calculation between sets of points. Given Po...

3 months ago

Solved


Generate a matrix as follows
write a Function that gives like the following for a random n: n=2 ans= [ 0 1 1 0] n=6 ans= [ 0 ...

3 months ago

Solved


Find the number of days in a given year
Given a year number (eg. 2000) as input, find how many days are there in the given year.

3 months ago

Solved


Play Outside In with primes

3 months ago

Solved


Identify prime words

3 months ago

Solved


Determine whether a number is unprimeable
The number 204 is unprimeable because no single digit can be changed to make it prime. In contrast, the number 207 is not unprim...

3 months ago

Solved


List the dihedral primes

3 months ago

Solved


Ugly numbers - 02
Ugly numbers are those whose prime factors are 2, 3 or 5. find the nth ugly number. n.b. unlike the previous problem,trivi...

3 months ago

Solved


Ugly numbers - 03
For this case, a number is defined ugly if it has prime factors consisting of only elements of x. Find the nth ugly number. ...

3 months ago

Solved


Play PRIMEGAME

3 months ago

Solved


Determine whether a number is a prime self number
Integers can be classified as generated numbers or self numbers. A generated number is one that can be expressed as the sum of a...

3 months ago

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