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Purely prime (Posted on 2013-02-19) Difficulty: 2 of 5
Twenty-one prime numbers are in arithmetic sequence with difference d. Prove that d is divisible by 9699690.

No Solution Yet Submitted by Danish Ahmed Khan    
Rating: 5.0000 (1 votes)

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re: Just the proof (spoiler) | Comment 2 of 3 |
(In reply to Just the proof (spoiler) by Steve Herman)

But just for curiosity's sake primes in arithmetic progression can be found at
  Posted by Charlie on 2013-02-19 18:39:18

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