Mark Underwood wrote:

> And for the tuple

>

> x-64, x-32, x-16, x-8, x-4, x-2, x+2, x+4, x+8, x+16, x+32, x+64

>

> x must have a factor of 3,5,7,11,13.

I have computed the 4 smallest x such that these 14 are all primes:

x +/- 2, 4, 8, 16, 32, 64, 128

A PrimeForm/GW input file with x values in {. . . .} :

ABC2 $b+2^$a & $b-2^$a

a: from 1 to 7

b: in {93487500801880185 539493168332973855 635219113875010665

892427005980104595}

My tuplet finder used 5 GHz hours with prp'ing by the GMP library.

I was surprised to see that the primes are consecutive for the smallest,

x = 93487500801880185.

--

Jens Kruse Andersen