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A prime number is one (which is) measured by a unit alone.

Euclid

 

 

 

 

Primax

International Math Competition

polls

   

 

   

   

 

Primax 2019

Announcement of results

The winning formula of Primax 2019 in both A and B categories:

a(n) = 6*(n^2+n)+31

This formula gives 75 primes in the interval [1,100] and 135 in the interval [1,200].

By comparison, the famous Euler formula (whose use was excluded by the application rules) gives 86 primes in the [1,100] interval and 156 primes in the [1,200] interval.

The winning bid starts with 29 prizes, while the Euler formula gives 40 prizes.
The winning bidder also indicated that the series generated by the formula = since 2001) can be found in OEIS under number A060844 (and for this reason, wishes to remain anonymous).

The announcer is pleased to note that on the one hand, many interesting other formulas have been encountered, and on the other hand, the formulas and reflections submitted have greatly contributed to the further development of the scheme.

We thank all applicants, writers, contributors and supporters.

The announcer and expected number of participants will publish their results and experiences in professional forums in the near future. For this purpose, we kindly recommend the Acta Mundi online site and the Primax Facebook page in addition to the existing prestigious magazines.

Thanks again for your participation and attention, we look forward to seeing you again in the spirit of Primax 2020.

 

  

Primax

(in French)

Primax

(in Hungarian)

 
   

 

 

 

List of primes

 

 

 

The

PRIMAX 2019

competition closed on November 30 2019.

 

   

Formula for primes

 

 

8458 visitors,

23 submissions.

Thanks to all!

 

   
   

 

 

 

OEIS

 

 

 

Coming soon to

 

PRIMAX 2020!

 

 

   
   

 

 

   

 

Do you have questions, comments, suggestions about the current call or the development of the competition, for example, the categories planned for next year?

Can you help promote the competition, share it or give good advice?

Do not hesitate to send us a message at the address above. We will be obliged to you!

We will be happy to know you as our volunteer in any role.

 

   
   

 

   

  

  

 

 

 

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