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Old 2022-05-22, 09:31   #34
xilman
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Quote:
Originally Posted by chalsall View Post
Or, even, simply not have WinBlows in the equation at all.
I withdraw my earlier remark.

There are some unusual systems which appear to require Windows.

The only driver for my observatory dome is exclusively Windows. There doesn't appear to be anything for Linux or MacOS, and I have looked very hard.

It might, just might, run under WINE but I really don't want to put that much effort into something which may not work anyway.

Last fiddled with by xilman on 2022-05-22 at 09:33 Reason: Add first sentence
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Old 2022-05-23, 09:46   #35
xilman
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Originally Posted by xilman View Post
I withdraw my earlier remark.

There are some unusual systems which appear to require Windows.

The only driver for my observatory dome is exclusively Windows. There doesn't appear to be anything for Linux or MacOS, and I have looked very hard.

It might, just might, run under WINE but I really don't want to put that much effort into something which may not work anyway.
@chasall: I started replying to your response here but realised we were too off-topic even for a thread titled "off-topic".

It seems to be much more appropriate in the Hobbies/Astronomy sub-forum.

Last fiddled with by xilman on 2022-05-23 at 09:47 Reason: Add URL
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Old 2022-05-23, 18:11   #36
ryanp
 
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Originally Posted by sweety439 View Post
Can you prove the primality of these PRPs which are in order to prove the Riesel and Sierpinski conjecture?

* (79*73^9339-1)/6 (R73)
* (27*91^5048-1)/2 (R91)
* (133*100^5496-1)/33 (R100)
* (3*107^4900-1)/2 (R107)
* (27*135^3250-1)/2 (R135)
* (201*141^5279-1)/20 (R141)
* (1*174^3251-1)/173 (R174)
* (11*175^3048-1)/2 (R175)
* (191*105^5045+1)/8 (S105)
* (11*256^5702+1)/3 (S256)
I did one of these as a warmup for testing out cm 0.4.1-dev with Paul Underwood's gw_prp hack enhancement. You should work on the others yourself.
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Old 2022-05-28, 14:29   #37
sweety439
 
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Default Does such repunit exist?

Is there a repunit Rp with p prime, such that 2*p+1 is prime, and Rp/(2*p+1) is also prime, in base 10? In base 2, there are many such p's: {11, 23, 83, 131, 3359, 130439, 406583, ...}, see A239638, also in base 3, there are such p's: {5, 11, 23, 131}, in base 6, the only known such p is 11, but in base 10, I check to 100000 without finding any such prime p, so, is there a prime p such that 2*p+1 is prime, and Rp/(2*p+1) is also prime? (i.e. is there a prime p such that the repunit Rp is a semiprime, and 2*p+1 is a factor of it?)
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