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Your task requirement of counting the number of twin primes is counter-exampled as your examples (instead) show the <br>'''number of twin prime pairs''' instead of the '''number of twin primes'''.
<br>The number of twin primes below '''10''' is '''3'''.
<br>The number of twin prime pairs, however, is '''2'''.
The examples shown in the preamble should be fixed to agree with the task's requirements, or, of course, the task's requirements could be changed.
This task has the same "problem/issue" as does any task concerning ''pairs'' of primes. Consider the limit of
'''42'''.
<br>Now, '''41''' is a twin prime (and should be counted), but '''43''' wouldn't be counted as it isn't under the '''42''' limit.
<br>As it happens, when the limit is specified and the twin primes don't bracket the specified limit, this issue won't be exposed.
<br>But not specifying a bracketed limit doesn't belie that the examples may have that error in their programs.
Also, some task authors like to add a ''stretch goal'' or ''extra credit'' task (optional) requirement(s).
<br>You could ask for limits of: '''10,000 100,000 1,000,000 10,000,000'''.
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::::::::::::::::::::::::: -- [[User:Gerard Schildberger|Gerard Schildberger]] ([[User talk:Gerard Schildberger|talk]]) 08:43, 26 July 2020 (UTC)
::Hi, thanks for the help given for creating the task Twin Prime Conjecture. I have made changes including a challenge section and refined the description of the task to ask for the number of pairs of twin primes instead of the number of twin primes in bold.
:: JusC 12:19, 27 July 2020 (UTC)
== images ==
Here's what I did for [[Barnsley_fern#Phix]] : <br>
output: [https://imgur.com/a/04ZZZt9 on imgur]
<nowiki>output: [https://imgur.com/a/04ZZZt9 on imgur]</nowiki>
And here's one I hosted on my own website for [[Boids#Phix]] : <br>
Screenshot: [http://phix.x10.mx/shots/boids.png http://phix.x10.mx/shots/boids.png]
<nowiki>Screenshot: [http://phix.x10.mx/shots/boids.png http://phix.x10.mx/shots/boids.png]</nowiki>
HTH --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 01:14, 28 July 2020 (UTC)
:Thanks for the suggestion! Is there any way to view the image without redirecting to another site?
: JusC 10:22, 28 July 2020 (UTC)
::Sadly not as far as I know. I think I would have spotted one by now if that were at all possible. --[[User:Petelomax|Pete Lomax]] ([[User talk:Petelomax|talk]]) 18:35, 29 July 2020 (UTC)
:::Ok, thanks for the help!
::: JusC 10:12, 30 July 2020 (UTC)
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