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Old 2017-07-15, 17:56   #1
pepi37
 
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After milion nines:)

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Default Unhappy in choosing prime sequence :-)

Whatever sequence I choose I fail to find big prime (above 1.2M digits)
So right question is- to change sequence when I reach some point, or to stick with few and be patient
What is your suggestion/advice ?
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Old 2017-07-15, 18:14   #2
paulunderwood
 
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Either you can look for light or heavy k sequences. Heavy has the advantage of the tests not taking as long. You might also consider a fixed n search.
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Old 2017-07-15, 18:18   #3
science_man_88
 
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Quote:
Originally Posted by pepi37 View Post
Whatever sequence I choose I fail to find big prime (above 1.2M digits)
So right question is- to change sequence when I reach some point, or to stick with few and be patient
What is your suggestion/advice ?
how are you choosing the sequence? is it a polynomial , a recurrence, a special form like Mersennes? have you narrowed down the properties that may be stopping it from working ?
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Old 2017-07-15, 18:20   #4
Batalov
 
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Quote:
Originally Posted by pepi37 View Post
Whatever sequence I choose I fail to find big prime (above 1.2M digits)
So right question is- to change sequence when I reach some point, or to stick with few and be patient
What is your suggestion/advice ?
Your question contains the answer.
So the answer to your question is: yes.
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Old 2017-07-15, 18:27   #5
pepi37
 
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Quote:
Originally Posted by paulunderwood View Post
Either you can look for light or heavy k sequences. Heavy has the advantage of the tests not taking as long. You might also consider a fixed n search.
Primary I take sequences where K is 4 :)
So for last one 4*53^n+1 nash weight is 585. Also there is 4*155 and 4*212 and so on. But also there is few sequences of base 10, where also ( regardless much more weight) Ihave no luck :)
So I take various bases and various K :)
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Old 2017-07-15, 18:33   #6
pepi37
 
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Quote:
Originally Posted by science_man_88 View Post
how are you choosing the sequence? is it a polynomial , a recurrence, a special form like Mersennes? have you narrowed down the properties that may be stopping it from working ?
Gary told me in one message that sequences I choose is ordinary much harder to produce prime then "ordinary one" :)
So that may be price "I pay" :)
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Old 2017-07-15, 18:35   #7
pepi37
 
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Quote:
Originally Posted by Batalov View Post
Your question contains the answer.
So the answer to your question is: yes.
Crystal clear answer

What else to do : make deeper sieve, and wait
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Old 2017-07-15, 18:38   #8
pinhodecarlos
 
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be patient
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Old 2017-07-15, 18:39   #9
pepi37
 
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Quote:
Originally Posted by pinhodecarlos View Post
be patient
2:0 to be patient :)
So it must be only good answer :)
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Old 2017-07-15, 19:53   #10
a1call
 
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This reminds me of a Mork and Mindy episode where Mork goes to a bank to open an account:

Teller: Name?

Mork: Mork,

Teller: Is that your first name or last name?

Mork: Yes.

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