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primeform · User group for PFGW & PrimeForm programs
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Group Information

  • Members: 946
  • Category: Number Theory
  • Founded: Sep 26, 1999
  • Language: English
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Activity within 7 days:

1 New Member - 27 New Messages - New Questions

Description

Discussion group for PrimeFormGW (PFGW) primality-testing program. Use the list to discuss anything prime-related. Theory, algorithms, methods, and other computer programs are suitable topics.

OpenPFGW v1.2 - Official Release Feb 11, 2005
Win32 (95/98/ME/NT/2000/XP)
Linux binary Static linked Linux binary
FULL Source code Builds under Win32 and Linux, and other x86 systems

Download the correct version for your OS and unzip to a location of your choice. The packages include full instructions, information, and a tutorial. Open a command prompt or a shell, and you're ready to go!

Most Recent Messages

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Re: Crump penalty for too much factorization
... But then you should divide x by 3, to optimize the sextics. Hence I have been running with n=subst(y*(2*y-11)^2/9,y,(2*x^3-10*x-3)^2); which is an integer
Posted - Wed Nov 25, 2009 2:11 pm
 djbroadhurst
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Re: Crump penalty for too much factorization
Interesting. For sextics, I get your exact same degree split if I substitute 18*x^3-10*x-1 instead of 18*x^2-11*x-2. i.e. n=subst(121*x^2-396*x^4+324*x^6, x,
Posted - Wed Nov 25, 2009 7:35 am
 Joe
jkcmagic
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Re: Crump penalty for too much factorization
... {for(k=0,10,f=factor(n-k)[,1]; print([k,vector(#f,j,poldegree(f[j]))]))} [0, [2, 4]] [1, [3, 3, 6]] [2, [4, 8]] [3, [12]] [4, [2, 2, 4, 4]] [5, [12]] [6,
Posted - Wed Nov 25, 2009 1:57 am
 djbroadhurst
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Re: Crump penalty for too much factorization
Cool, I'll be looking forward to hearing from you on your results. I found a few other promising polynomials, such as: n=subst(121*x^2-396*x^4+324*x^6, x,
Posted - Tue Nov 24, 2009 5:32 pm
 Joe
jkcmagic
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Re: Crump penalty for too much factorization
... Thanks Jarek. That is indeed my aim. But I may need to cross my toes, as well as my fingers :-) David
Posted - Tue Nov 24, 2009 5:51 am
 djbroadhurst
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009 83 92 52 67 26 23 33 91 25 19 53
2008 39 11 33 22 11 65 34 35 34 94 32 19
2007 147 109 93 31 101 36 33 58 33 6 18 20
2006 113 148 143 189 112 99 24 40 106 70 204 157
2005 148 83 192 194 175 166 137 100 40 203 72 67
2004 74 31 64 54 100 60 145 62 104 168 126 111
2003 32 52 13 26 126 162 123 114 77 194 90 79
2002 24 20 43 25 21 13 54 27 31 34 75 165
2001 88 49 26 84 109 157 130 51 40 35 12 50
2000 116 127 86 55 42 55 27 92 57 177 236 224
1999 16 73 98 162
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