20080806, 17:38  #1 
Jul 2003
wear a mask
1,667 Posts 
Twenty Oldest Primes on Top 5000 List

20080807, 01:44  #2 
"Richard B. Woods"
Aug 2002
Wisconsin USA
7692_{10} Posts 
M32, M33, M34, M36, M37 and M38 are all on the oldest20 list, but M35 is not ?????
I think something needs repair. The top5000 list I downloaded on "Sat Jun 9 18:50:25 CDT 2007" shows Code:
73 149797*2^14141371 74 2^13982691 75 192089*2^13956881 Code:
105 149797 * 2^1414137 1 106 127 * 2^1398889  1 107 1564347 * 2^1398269  1 109 192089 * 2^1395688  1 I've sent an email to Chris Caldwell.    Correcting this will push one of the nonMersennes off the oldest20 list. Last fiddled with by cheesehead on 20080807 at 02:12 
20080807, 02:17  #3 
Jul 2003
wear a mask
683_{16} Posts 
Oh, cool! I thought the linked search was just an interesting list of old primes. Glad to see it was actually useful as an error check.

20080807, 05:43  #4 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
10011001000000_{2} Posts 

20080807, 15:20  #5 
Jul 2003
wear a mask
11010000011_{2} Posts 
New Link

20080807, 17:13  #6 
"Lucan"
Dec 2006
England
2·3·13·83 Posts 
Why the prevalence of k2^n + 1 over k2^n  1
among nonMersennes? Last fiddled with by davieddy on 20080807 at 17:17 
20080807, 23:46  #7 
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}×3×641 Posts 
Caldwell replied that what I noticed was an unintended side effect of verifications he was performing. "But, as you noticed, if you downloaded while it was verifying, then it did not show on the list. I'll fix that."
However, what I actually reported to Caldwell was that M35 was missing from http://primes.utm.edu/primes/lists/all.pdf. I didn't mention that it was missing from http://primes.utm.edu/primes/search.php?MinAge=2860. I suppose his fix covered that, too. Last fiddled with by cheesehead on 20080808 at 00:11 
20080808, 00:13  #8  
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}·3·641 Posts 
Quote:
Perhaps what you're getting is not the 20 oldest primes on the Top 5000 list, but the 20 largest primes older than 2860, or 2865, days, respectively? In that case, a few days from now http://primes.utm.edu/primes/search.php?MinAge=2860 and http://primes.utm.edu/primes/search.php?MinAge=2865 may return identical results. Last fiddled with by cheesehead on 20080808 at 00:24 

20080825, 00:25  #9  
"Richard B. Woods"
Aug 2002
Wisconsin USA
1111000001100_{2} Posts 
Quote:


20080827, 12:31  #10 
Jun 2003
Oxford, UK
2×971 Posts 

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