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2018-12-14, 21:35   #8
sweety439

Nov 2016

34×31 Posts

Quote:
 Originally Posted by sweety439 See post https://mersenneforum.org/showpost.p...&postcount=281, 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).