There is a huge (maybe infinite) number of twin primes, like (11,13), but only one triplet with d=2, i.e. (3,5,7).
However, one can get longer arithmetic series with other values of d.

Please list all the increasing arithmetic series such that:
a. They consist of at least 5 prime members.
b. Each number is under 100.

Example: 5,11,17,23,29. (d=6)

(In reply to expanding (spoiler included) by Charlie)

The reason I've introduced the 100 nas a limit was to allow a

non-computer-aided solution.

Still. t6he expansion is interesting and appreciated.

Posted by Ady TZIDON on 2011-11-17 15:49:45