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enzocreti 2020-03-04 16:28

Are there infinitely many palindromic numbers of this form
 
Are ther einfinitely many palindromic primes of the form




(10^n-666999666999667)/333?

Stargate38 2020-03-04 19:02

(10^n-666999666999667)/333 is never prime. It's always divisible by 3.

[url=http://www.factordb.com/index.php?query=%2810^n-666999666999667%29%2F333&use=n&n=1&VP=on&VC=on&EV=on&OD=on&PR=on&FF=on&PRP=on&CF=on&U=on&C=on&perpage=4&format=1&sent=Show]Proof[/url]


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