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# Talk:Generalized Fermat number 5 2 4

Karsten, please check to see if I did this one correctly. I would like to add a few more GFNs but will wait for you to check this one. It would not let me enter the 10-digit cofactor in GF divisor form, i.e. 49158491*2^5+1. Instead I was forced to enter the full cofactor.

I could not understand why it would not allow this. I confirmed that 49158491*2^5+1 is a Factor of xGF(4,5,2) both in the FactorDB and with PFGW.

Gary Barnes (talk) 22:28, 22 May 2024 (UTC)

Edit: I needed to add 49158491,5 as a GF Divisor before adding 5,2,4 as a GFn. All looks good to me now. Please verify if everything looks OK.

Gary Barnes (talk) 05:41, 23 May 2024 (UTC)

- Adding only a number (like here only '1573071713') should work correctly: the factor is listed at the bottom.
- Adding as a new GFN factor for example as '1573071713,2' will only show the red link to the Proth prime page, the red link to the GFN factor page and the k-value of this entry, which is false here.
- This template looks for the given GFN factor page and reads the prime factor from it.
- How to:
- add the new GFN here, do not save, only "Show preview"
- call the new GFN factor link in a new page, fill in the parameters (k- & n-value given in the page title), save if everything is ok
- return to this page, again "Show preview", the factor should be shown correctly now
- save after checked ok

- Karbon (talk) 06:54, 23 May 2024 (UTC)