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Twins, triplets and more (Posted on 2011-11-17) Difficulty: 4 of 5
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)

No Solution Yet Submitted by Ady TZIDON    
Rating: 4.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: expanding (spoiler included) | Comment 3 of 5 |
(In reply to expanding (spoiler included) by Charlie)

I see upon expanding the search even farther, that the 9-member series is really the start of a 10-member series:

 199  409  619  829  1039  1249  1459  1669  1879  2089

  Posted by Charlie on 2011-11-17 12:57:52
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