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(11C) Random Prime Number Generator
10-21-2018, 05:09 PM (This post was last modified: 10-21-2018 05:12 PM by Dieter.)
Post: #8
RE: (11C) Random Prime Number Generator
(10-21-2018 03:22 AM)Gamo Wrote:  Sure do, I like to see the update version.

OK - but this is not as sophisticated as the program Thomas posted. ;-)

For four-digit prime numbers your program requires two changes.
First change the program start this way:



This generates an odd random number between 1001 and 9999. Take a closer look at how it works: first a random integer between 0 and 4499 is generated. Then this is doubled, which yields an even integer between 0 and 8998. Finally 1001 is added, resulting in an odd random integer between 1001 and 9999.

Note: due to roundoff issues the largest prime candidate can be 10001. But since 10001 is not a prime number it will not be returned.

Finally remove the complete LBL 3 part at the end. This seems to be left from another prime number program. Replace the "GTO 3" line with "GTO E".

After these changes the program will generate four-digit random integers.

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(11C) Random Prime Number Generator - Gamo - 10-20-2018, 01:08 PM
RE: (11C) Random Prime Number Generator - Dieter - 10-21-2018 05:09 PM

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