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Vinogradov's Goldbach Trio

(3)
The ternary Goldbach conjecture is now considered proven as of 2013. http://blogs.ams.org/mathgradblog/2013/07/03/infinitude-fermat-numbers/ - Jack On
Jack Brennen
3
posts
Feb 24

Inserting Digits into Odd Integers

(3)
Number one is not true. The smallest counterexample is for N=4173. For 4173, there are thirty numbers that can be created by inserting a digit between two
Jack Brennen
3
posts
Feb 23

Roots of -1 PRP test.

(12)
{tst(n,k)=n%(2*k)!=1&&n%(2*k)!=2*k-1&&gcd(k,n)==1&& Mod(Mod(1,n)*(x+1),x^k+1)^n==x^(n%(2*k))+1} This base x+1 test seems to work for k>3. Paul - still testing
paulunderwooduk
12
posts
Feb 16
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