mersenneforum.org Thread for posting tiny primes
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 2010-07-25, 02:45 #12 3.14159     May 2010 Prime hunting commission. 24×3×5×7 Posts Prime found! Prime found! The first search is finished: 145048 * 37544096 + 1 (14647 digits) Although, still shit out of luck for the other one. 22 hours, got nothing. Next search: Generalized Proth: k * 2611300 + 1 (15995-15996 digits). I'll let it sieve for the night. Last fiddled with by 3.14159 on 2010-07-25 at 03:40 Reason: Timing incorrect!!!
 2010-07-25, 11:37 #13 3.14159     May 2010 Prime hunting commission. 24·3·5·7 Posts Hmm.. The search has surprisingly yielded nothing at all, after 30 hours. Even at worst case odds, 1 in 46k, I was supposed to have a prime 12 hours ago. Last fiddled with by 3.14159 on 2010-07-25 at 11:47
 2010-07-25, 13:14 #14 3.14159     May 2010 Prime hunting commission. 24×3×5×7 Posts More submissions: 201181 * 2611300 + 1 (15995 digits). That one was relatively quick compared to the other searches. Sieved up to 1 trillion. Hopefully something comes up soon for the other search. 10222 * 61800 + 1 (1405 digits) 6352 * 62300 + 1 (1794 digits) 8440 * 62300 + 1 (1794 digits) 7736 * 62302 + 1 (1796 digits) 7737 * 63100 + 1 (2417 digits) 12148 * 63100 + 1 (2417 digits) A power interruption ruined the main search. I remember the cutoff value for k, however, so it's no great loss. The only downside: I'm going to have to do 2-4 hours of sieving. Again. Last fiddled with by 3.14159 on 2010-07-25 at 13:59
 2010-07-25, 15:35 #15 3.14159     May 2010 Prime hunting commission. 24×3×5×7 Posts More submissions: 8166 * 144500 + 1 (5162 digits) 21615 * 144500 + 1 (5162 digits) 11558 * 62600 + 1 (2028 digits) 14446 * 62600 + 1 (2028 digits) 6818 * 62640 + 1 (2059 digits) 7586 * 62760 + 1 (2152 digits) 11422 * 62880 + 1 (2246 digits) 27571 * 63100 + 1 (2417 digits) 28548 * 63100 + 1 (2417 digits) Last fiddled with by 3.14159 on 2010-07-25 at 16:14
 2010-07-25, 18:07 #16 3.14159     May 2010 Prime hunting commission. 24·3·5·7 Posts More submissions: (Base: 18, Exponent: 3900): Range tested: 26k to 46k: 26880 * 183900 + 1 (4900 digits) 28796 * 183900 + 1 (4901 digits) 29370 * 183900 + 1 (4901 digits) 32730 * 183900 + 1 (4901 digits) 34168 * 183900 + 1 (4901 digits) 35523 * 183900 + 1 (4901 digits) 37313 * 183900 + 1 (4901 digits) 42612 * 183900 + 1 (4901 digits) Also: Still sieving for the k * 779068192 + 1 prime. I'm planning on doing at least 2x the sieving I did last time around. Last fiddled with by 3.14159 on 2010-07-25 at 18:32
 2010-07-25, 19:42 #17 firejuggler     Apr 2010 Over the rainbow 22·641 Posts 540*54^4700+1 ...
2010-07-25, 19:55   #18
CRGreathouse

Aug 2006

32×5×7×19 Posts

Quote:
 Originally Posted by 3.14159 3. Is not a "small" prime. (Please ensure it is ≥ 1000 digits.)
See Sloane's A074282.

2010-07-25, 20:00   #19
kar_bon

Mar 2006
Germany

288910 Posts

Quote:
 Originally Posted by 3.14159 Prime posting thread. (...) 1. Has no factors below 230
This is more important!

I have to check, if I can find a prime with a factor > 2^30!

Sorry, this had to be written here!

Last fiddled with by kar_bon on 2010-07-25 at 20:03

 2010-07-25, 20:08 #20 firejuggler     Apr 2010 Over the rainbow 22·641 Posts probable prime maybe
2010-07-25, 20:10   #21
3.14159

May 2010
Prime hunting commission.

24×3×5×7 Posts

Quote:
 Originally Posted by CRGreathouse See Sloane's A074282.
... *Picard facepalm* Thank you for the barely qualified primes.

Quote:
 Originally Posted by kar_bon I have to check, if I can find a prime with a factor > 2^30!
.. Dammit, you get the idea. Trial divide to 230.

2010-07-25, 21:52   #22
CRGreathouse

Aug 2006

32×5×7×19 Posts

Quote:
 Originally Posted by 3.14159 ... *Picard facepalm* Thank you for the barely qualified primes.
Yes, I saw the qualification and typed
Code:
nextprime(10^999)-10^999
into Pari.

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