Jim Howell’s Math Page

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My Mathematical Pages


Mathematical Curiosities

5882353 = 588^2 + 2353^2

79 * 9 = 711
799 * 89 = 71111
7999 * 889 = 7111111
79999 * 8889 = 711111111
799999 * 88889 = 71111111111
7999999 * 888889 = 7111111111111
etc.

Tables of Factors

The Internet has many tables of factors of various kinds of numbers. For example, the Cunningham Project finds factors of numbers of the form a^n-1 and a^n+1, where “a” is from 2 to 12, and “n” goes up to some limit, so that the numbers to be factored are of some reasonable size, say under 200 digits or so.

Links to some tables of factors.

The following sites have links to several tables of factors. I have factorization tables for the following types of numbers: Hisanori Mishima also has a table for prime numbers strung together.

Mathematical Links


Send me e-mail at jrhowell@ix.netcom.com
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This page was last updated on March 19, 2018.