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 Showing results 1 to 3 of 3 Search took 0.00 seconds. Search: Posts Made By: paulunderwood
 Forum: Miscellaneous Math 2021-10-14, 22:03 Replies: 2 Views: 339 Posted By paulunderwood Semi-primes are being stubborn, but when I feed... Semi-primes are being stubborn, but when I feed in Carmichael numbers counterexamples abound such as [n,a]=[19384289, 8494896] This is yet another test that shows that X Frobenius tests with X...
 Forum: Miscellaneous Math 2021-10-14, 01:56 Replies: 2 Views: 339 Posted By paulunderwood I can save a few Selfridges by using the weaker... I can save a few Selfridges by using the weaker form of Fermat's Little Theorem: { tst(n,a)=kronecker(a^2-4,n)==-1&& gcd(a+4,n)==1&& Mod(a-1,n)^n==a-1&& Mod(a,n)^n==a&& Mod(a+1,n)^n==a+1&&...
 Forum: Miscellaneous Math 2021-10-13, 19:13 Replies: 2 Views: 339 Posted By paulunderwood Single Parameter Frobenius test -- 1+1+1+1+2 Selfridges { tst(n,a)=kronecker(a^2-4,n)==-1&& gcd((a^3-a)*(a+4),n)==1&& Mod(a-1,n)^(n-1)==1&& Mod(a,n)^(n-1)==1&& Mod(a+1,n)^(n-1)==1&& Mod(a+4,n)^(n-1)==1&& Mod(Mod(x+2,n),x^2-a*x+1)^(n+1)==2*a+5;} ...
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