- Hi all,

What can I use to sieve for N=35*10^k - 1? And, would this form be considered near-repunit? I did not see this form in Multisieve, but I suspect that the form C*b^k - 1, where C and b are constants and k a variable is being sieved. Let me know where I can such a program. If none exist, Mark R., can you customize Multisieve to do that?

--Cletus

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[Non-text portions of this message have been removed] - Hi Cletus,

I don't consider 3499...99 is near-repdigit because Chris K.

Caldwell's Top Twenty page (http://primes.utm.edu/top20/page.php?id=15)

says "Let all but one of the digits be the same, these are the near

repdigit primes".

By the way, I had sieved many near-repdigit and quasi-repdigit

sequences by my own program, for our factorization tables

(http://homepage2.nifty.com/m_kamada/math/factorizations.htm). Even

though the factor table of 35*10^n-1 is not opened yet, I had sieved

it too.

1:35*10^(6*k+4)-1 is divisible by 13

2:35*10^(16*k)-1 is divisible by 17

3:35*10^(18*k+4)-1 is divisible by 19

4:35*10^(22*k+8)-1 is divisible by 23

5:35*10^(28*k+18)-1 is divisible by 29

6:35*10^(15*k+3)-1 is divisible by 31

7:35*10^(21*k+15)-1 is divisible by 43

8:35*10^(46*k+37)-1 is divisible by 47

9:35*10^(58*k+38)-1 is divisible by 59

10:35*10^(60*k+23)-1 is divisible by 61

...snip...

1114:35*10^(5520*k+4029)-1 is divisible by 309121

1115:35*10^(4656*k+4080)-1 is divisible by 372481

1116:35*10^(4980*k+4082)-1 is divisible by 373501

1117:35*10^(4817*k+4148)-1 is divisible by 529871

1118:35*10^(9620*k+3979)-1 is divisible by 538721

1119:35*10^(8842*k+497)-1 is divisible by 565889

1120:35*10^(7891*k+1338)-1 is divisible by 694409

1121:35*10^(6868*k+2646)-1 is divisible by 721141

1122:35*10^(5863*k+761)-1 is divisible by 1008437

1123:35*10^(7599*k+2250)-1 is divisible by 1124653

general term: 35*10^n-1

upper limit of periods: 10000

upper limit of periodical factors: 4294967296

checked terms: 100000000

terms divided by periodical factors: 70915377

room for prime numbers: 29.08%

Cheers,

Makoto

On Thu, 13 Jan 2005 06:49:26 -0800 (PST), Cletus Emmanuel wrote:

>

>Hi all,

>What can I use to sieve for N=35*10^k - 1? And, would this form be considered near-repunit? I did

>not see this form in Multisieve, but I suspect that the form C*b^k - 1, where C and b are constants

>and k a variable is being sieved. Let me know where I can such a program. If none exist, Mark R.,

>can you customize Multisieve to do that?

>

>

>--Cletus

>

>

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> Yahoo! Mail - You care about security. So do we.

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>[Non-text portions of this message have been removed]

>

>

>

>

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--

KAMADA Makoto

m_kamada@...

http://homepage2.nifty.com/m_kamada/ > Hi all,

Use NewPGen.

> What can I use to sieve for N=35*10^k - 1? And, would this form

> be considered near-repunit? I did not see this form in

> Multisieve, but I suspect that the form C*b^k - 1, where C and b

> are constants and k a variable is being sieved. Let me know where

> I can such a program. If none exist, Mark R., can you customize

> Multisieve to do that?

--Mark- Thanks guys,

I downloaded the siever and have started using it. Now, would Proth.exe be better PrPing or should I used PFGW?

---Cletus

mgrogue@... wrote:> Hi all,

Use NewPGen.

> What can I use to sieve for N=35*10^k - 1? And, would this form

> be considered near-repunit? I did not see this form in

> Multisieve, but I suspect that the form C*b^k - 1, where C and b

> are constants and k a variable is being sieved. Let me know where

> I can such a program. If none exist, Mark R., can you customize

> Multisieve to do that?

--Mark

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[Non-text portions of this message have been removed] - --- In primenumbers@yahoogroups.com, Cletus Emmanuel <cemmanu@y...> wrote:
> Thanks guys,

Proth.exe be better PrPing or should I used PFGW?

> I downloaded the siever and have started using it. Now, would

Definitely PFGW or LLR (LLR might be faster). Proth is best for GFNs.

--Mark