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Old 2018-12-14, 21:35   #8
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Nov 2016

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Originally Posted by sweety439 View Post
See post, the conjectured k's for R4 are 361, 919, 1114, ..., and the conjectured k's for R10 are 334, 1585, 1882, ... and we can prove them.
Note that for R10 k=343, we should find an n such that (7*10^q-1)/3 and (49*100^q+7*10^q+1)/3 are both primes (the status of R10 k=343 is like the status for S63 k=3511808 and S63 k=27000000).
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