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Arithmetic prime (Posted on 2019-04-25) Difficulty: 3 of 5
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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  Subject Author Date
re: computer solution - OEIS findingsBrian Smith2019-04-26 01:21:09
Solutioncomputer solutionCharlie2019-04-25 14:50:25
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