Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2012-12-28 00:44:39

pellerinb
Member
Registered: 2012-12-26
Posts: 43

primes in sum_(i=1)^N i^i

As far as the first 20,000 numbers, there are only 5 primes discovered in this sequence:

{1, 5, 32, 288, 3413, 50069, 873612, 17650828, 405071317, 10405071317, 295716741928, 9211817190184, 312086923782437, 11424093749340453, 449317984130199828, 18896062057839751444, 846136323944176515621, 40192544399240714091045, 2018612200059554303215024, 106876212200059554303215024, 5949463230586042075684339445, 347377340594805599472331063029, 21227845340442717633827363973596, 1354963622190726842082908836817372, 90172805592203250075973442284082997, 6246292385799360560872647730684286773, 449672780628837130509122278349834179576, 33595195893882211993081850531714439992312, 2601281349055093346554910065262730566475781, 208492413443704093346554910065262730566475781,...}

I just thought this is interesting to others :)


Prime numbers have got to be the neatest things; they are like atoms. Composites are two or more primes held together by multiplication.
In biology, we use math like we know what we are talking about. Sad isn't it.

Offline

Board footer

Powered by FluxBB