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Generalized Cullen and Woodall primes can be twins

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Generalized Cullen Primes are defined as the primes of the form n.bn+1 with n+2 > b, while generalized Woodall Primes as the form n.bn-1 with n+2 > b. If we loose the restraint of n+2 > b to a plain n > 2, with every b>1, except for n = k^c and mod(n, c)=0,there is […]