×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Error in Exponentiation

Error in Exponentiation

Error in Exponentiation

(OP)
Folks,

I am trying to generate Mill's Primes and the code is very simple.

For K = 1 and 2, the program gives the correct answers of 2 and 11.
But, for K = 3 it gives 1359 with the M value specified.
According to the maths (and Excel), the correct answer should be 1361 - the 3rd Mill's Prime.

I fail to understand where my calculation is going wrong.

Can someone please help.

Regards

pa99

10 CLS
20 REM Generate Mill’s Primes
30 REM Mill’s Constant = 1.3063778838630806904686144926...
40 DIM P AS DOUBLE
45 DIM M AS DOUBLE
50 INPUT “Number of Primes” ; K
60 M = 1.306337788
80 FOR N = 1 TO K
90 E = 3^N
100 P = M^E
120 PRINT FIX(P), M
130 NEXT N
999 END

RE: Error in Exponentiation

If you use more precise constant

CODE

60 M = 1.3063778838630806904686144926 
you will get for K = 3 the result P = 1361

RE: Error in Exponentiation

(OP)
Thanx

Great help.

RE: Error in Exponentiation

Hi pya,

I learned something new from you again smile
As a former mathematician, I've never heard of Mill's prime numbers or those constants - almost unbelievable. I only read about it yesterday on Wikipedia: https://en.wikipedia.org/wiki/Mills%27_constant
I studied math and taught in a college for about 6 years. But I was mostly into numerical mathematics, differential equations, optimization, and statistics. Number theory has never been an area of interest to me.

RE: Error in Exponentiation

(OP)
Hi mikrom,

A kindred spirit.

Studied maths at uni but never enjoyed it.
Too many exams and too much pressure.

Now I enjoy it thoroughly (along with Physics).
My main interests are in Prime Numbers and Cantor's Infinite Set theory.
I also enjoy Linear Programming and use Excel's Solver to keep in touch.

Regards

pya

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close