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primenumbers · Prime numbers and primality testing
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Group Information

  • Members: 1173
  • Category: Number Theory
  • Founded: Dec 27, 2000
  • Language: English
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Activity within 7 days:

3 New Messages - New Questions

Description

PrimeNumbers is a e-mail discussion list for those who enjoy prime numbers.  Some look for patterns, some seek to find new records, others try to understand the distribution.  We try to limit our discussion to prime numbers, primality testing, and very closely related subjects.

If you enjoy prime numbers there are similar lists you might enjoy, such as PrimeForm focusing on primality proving programs and GIMPS' Mersenne Primes list. 

If you think you have a Goldbach proof -- there are groups which deal specifically with such matters, perhaps try those first?

[ The Prime Pages : FAQ | Glossary | Links | Top 5000 | CrackPots ]

  • Avoid sending the same mail to multiple lists! (because it spams those who are on all of them).
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Most Recent Messages

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Re: Prp vs. pfgw.
... For base 2, I recommend LLR, since it will automatically do a Proth test for k*2^n+1 numbers. You could also use PFGW, but you would need to force a
Posted - Mon Nov 9, 2009 3:08 pm
 mgrogue@...
mgrogue
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Re: Prp vs. pfgw.
... Others will correct me if I am wrong, but I think they use the same arithmetic engine now. Of course prp.exe does not prove primality. LLR might be the
Posted - Sun Nov 8, 2009 7:19 pm
 Chris Caldwell
primemogul
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Prp vs. pfgw.
Hi I must test numbers in the form k*2^n+1. Is Pfgw faster than prp.exe? Thank Giovanni Di Maria
Posted - Sun Nov 8, 2009 7:12 pm
 Di Maria Giovanni
calimero22
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A Ramanjan Prime Corollary
A Ramanjan Prime Corollary: 2*p_(i-n) > p_i for i > k where k = primepi(p_k) = primepi(R_n). That is, p_k is the n'th Ramanujan Prime, R_n, and the k'th prime.
Posted - Sat Oct 31, 2009 9:07 pm
 reddwarf2956
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Re: Is this a convergent series and if so what is its sum?
... In fact, polling the odd primes really helps: I found 10,000 good digits in 7 minutes, by consulting the 24 odd primes p < 100. The result is in
Posted - Fri Oct 30, 2009 7:46 pm
 djbroadhurst
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009 60 35 100 223 152 175 178 119 152 118 3
2008 43 66 29 13 58 73 45 38 71 46 62 46
2007 109 141 70 46 84 42 35 27 29 19 25 36
2006 155 82 190 96 110 74 65 103 36 20 70 56
2005 165 130 210 180 196 112 89 66 60 59 145 209
2004 197 121 93 93 117 133 120 72 88 172 151 183
2003 616 414 354 343 271 217 316 300 235 242 193 207
2002 381 622 579 440 805 345 276 429 489 556 530 509
2001 257 205 265 272 204 382 430 435 588 645 537 403
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