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William Stonewall Monroe
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% Testing number of prime numbers in a given range
final=10^7; %upper limit
close all
%clear all
tic
count=[];
ratios=[];
l=[];
out=[];
disp('Please wait.. Finding number of primes.... ')
a=0;
parfor i=1:final
c=isprime(i);
if c==1
i;
a=a+c;
end
end
a;
ratio=a/final;
l=[l,final];
count=[count,a];
ratios=[ratios,ratio];
out=[l',count',ratios'];
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