20110117, 01:30  #34 
"Lennart"
Jun 2007
2140_{8} Posts 
10071*2^482995+1 is not prime. Proth RES64: 5932B5BFFD45353B Time : 364.135 sec.
10071*2^4829951 is Prime! Lennart 
20110117, 18:58  #35 
May 2010
499 Posts 
I've just checked all of the primes found in the rally and their +1 counterparts. No twins were found.
edit: The rally thread has now been unsticked. Last fiddled with by Oddball on 20110117 at 19:02 
20110201, 08:46  #36 
May 2010
499 Posts 
The n=480K485K, k<100K range is complete, so here's the breakdown of primes found:
n=480K481K: 6 primes n=481K482K: 8 primes n=482K483K: 8 primes n=483K484K: 1 prime n=484K485K: 8 primes k=120K: 10 primes k=20K40K: 10 primes k=40K60K: 1 prime k=60K80K: 5 primes k=80K100K: 5 primes It looks like the prime distribution is more uneven over ranges of k than over ranges of n. 
20110327, 09:15  #37 
"Lennart"
Jun 2007
1120_{10} Posts 
148323*2^4833561 is Prime !
148323*2^483356+1 is composite: RES64: [627C0FF8924559E6] Lennart 
20110327, 18:25  #38 
May 2010
499 Posts 

20110327, 18:45  #39 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
10253_{8} Posts 
With PFGW 3.4.4:
148323*2^483356+1 is composite: RES64: [627C0FF8924559E6] This matches Lennart's result. Maybe Oddball's was with a different algorithm that produces incompatible residues. 
20110327, 18:59  #40  
Nov 2010
30_{10} Posts 
Quote:
matches Oddball's residue, but using PFGW gives the same residue as yours. 

20110327, 19:37  #41 
A Sunny Moo
Aug 2007
USA (GMT5)
3×2,083 Posts 
MiniGeek and Lennart: you appear to have used PFGW for your tests. Since it does a PRP test, its residues will be incompatible with those from LLR, which does a Proth (full primality) test. Oddball appears to have used LLR, hence the discrepancy. For base 2, you generally want to stick with LLR for consistency purposes.
Last fiddled with by mdettweiler on 20110327 at 19:37 
20110327, 19:43  #42 
"Lennart"
Jun 2007
2140_{8} Posts 
First was PFGW
Here is LLR 148323*2^483356+1 is not prime. Proth RES64: E706A9FB79FE1491 Time : 449.365 sec. Lennart 
20110425, 18:54  #43 
"Lennart"
Jun 2007
2^{5}×5×7 Posts 
173943*2^4801661Is Prime
179025*2^4805781Is Prime 115095*2^4807481Is Prime 112983*2^4808821Is Prime 146649*2^4809891Is Prime 182379*2^4812011Is Prime 158655*2^4812571Is Prime 101085*2^4835101Is Prime 117711*2^4836351Is Prime 103077*2^4838101Is Prime 182523*2^4839361Is Prime I am just now checking the plus side. Lennart 
20110425, 19:02  #44  
A Sunny Moo
Aug 2007
USA (GMT5)
3×2,083 Posts 
Quote:
Last fiddled with by mdettweiler on 20110425 at 19:02 

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