mersenneforum.org Numbers of the form 6^j +7^k and pg primes
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 2020-02-15, 08:18 #1 enzocreti   Mar 2018 52610 Posts Numbers of the form 6^j +7^k and pg primes Pg(215) pg(69660) pg(92020) pg(541456) are probable primes with 215, 69660, 92020 and 541456 of the form 43s I realized that 215, 69660, 92020 and 541456 are congruent to + or - (7^3+1) mod (6^3+7^3) 344=7^3+1=(43*8) 6^3+7^3=13*43 8, 13, 43are numbers of the form 6^j+7^k with j, k>=0 So it should be correct to say that 215, 69660, 92020, 541456 are congruent to + or - (6^j+7^k)*(6^x+7^y) mod( (6^z+7^w)*(6^b+7^c)) With nonnegative j k x y z w b c Last fiddled with by enzocreti on 2020-02-15 at 08:59

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