Jon Grantham

activity

20122023

most citedA Probable Prime Test With High Confidence

34 citations · 84 across the 17 of their papers we have counts for

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Showing 2021Show all

3 papers · 1 filter

math.NT2021

Only finitely many $s$ -Cullen numbers are repunits for a fixed $s \geq 2$

Michael Filaseta, Jon Grantham, Hester Graves

We show that for any integer $s \geq 2$ , there are only finitely many $s$ -Cullen numbers that are repunits. More precisely, for fixed $s \geq 2$ , there are only finitely many intege…

math.NT2021

Finding a Widely Digitally Delicate Prime

Jon Grantham

This paper describes the construction of the first explicitly known widely digitally delicate prime.

math.NT2021

On Integers Whose Sum is the Reverse of their Product

Xander Faber, Jon Grantham

We determine all pairs of positive integers $(a, b)$ such that $a + b$ and $a \times b$ have the same decimal digits in reverse order: \[ (2,2), (9,9), (3,24), (2,47), (2,497), (2,499…

Only finitely many s-Cullen numbers are repunits for a fixed s≥2

Finding a Widely Digitally Delicate Prime

On Integers Whose Sum is the Reverse of their Product

Only finitely many $s$ -Cullen numbers are repunits for a fixed $s \geq 2$