World!OfNumbers |
HOME plate WON | |
||
---|---|---|---|

Details ofPalindromic Quasi_Over_Squares | |||

Palindromic Quasi_Over_Squares |

F_qsDecomposition of the quasi_over_square in its prime factors.DateDate of discovery by the author. Hypertext links to related topics in number theoryCommComments about the palindromic Quasi_Over_Square number.

[9] F_qs 30.103 = PRIME

Comm 30103 is the only known multi-digit palindromic prime of the form sigma(n)/d(n), when n is composite. ( McCranie and Honaker ) sigma(n) = the sum of all the factors of n, including 1 and n itself. d(n) = the number of factors of n, including 1 and n itself. 30103 is also nice because it comes up for n = 149645 (an odd number) and once for n = 179574 (an even number). n sigma(n) d(n) sigma(n)/d(n)=palprime 149645 180618 6 30103 179574 361236 12 30103 30103 is still the only "known" palprime with the property.

[ TOP OF PAGE]

Patrick De Geest - Belgium - Short Bio - Some Pictures

E-mail address : pdg@worldofnumbers.com