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Arithmetic prime (Posted on 2019-04-25)

What is the smallest positive integer k such that k+1, 2k+1, 3k+1, 4k+1 are all primes?

No Solution Yet Submitted by Danish Ahmed Khan

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Puzzle Answer

Comment 3 of 3 |

The required value of the smallest positive integer k is 330.

*** Don't know whether I can, but will try my best to arrive at an independent derivation (irrespective of whether its included in Sloane's OEIS) at a later date.

Edited on June 4, 2022, 12:33 am

Posted by K Sengupta on 2022-06-04 00:31:40

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