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Jean-Marie Sainthillier


Skinexigence

Last seen: 1 day 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...

2 months ago

Solved


Consecutive Prime Numbers

2 months ago

Solved


Concatenated Consecutive Prime

2 months 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...

2 months ago

Solved


List the good primes

2 months ago

Solved


List Proth primes

2 months 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. ...

2 months 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 ...

2 months 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. ...

4 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...

4 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 ...

4 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.

4 months ago

Solved


Play Outside In with primes

4 months ago

Solved


Identify prime words

4 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...

4 months ago

Solved


List the dihedral primes

4 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...

5 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. ...

5 months ago

Solved


Play PRIMEGAME

5 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...

5 months ago

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