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 A255389 Primes of the form 166^k - 165^k. 0
 331, 82171, 3751197451 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(4) has 1641 digits and a(5) has 1717 digits. - Vincenzo Librandi, Feb 22 2015 The values of k are 2, 3, 5, 739, 773, ... - Jinyuan Wang, May 30 2020 LINKS Michael P. May, On the Existence and Frequency Distribution of the Shell Primes, arXiv preprint arXiv:1510.01028 [math.CO], 2015. MATHEMATICA Select[Table[166^n - 165^n, {n, 1000}], PrimeQ] (* Vincenzo Librandi, Feb 22 2015 *) PROG (MAGMA) [a: n in [0..600] | IsPrime(a) where a is 166^n-165^n]; // Vincenzo Librandi, Feb 22 2015 (PARI) select(m->ispseudoprime(m), vector(10, k, 166^k-165^k)) \\ Jinyuan Wang, May 30 2020 CROSSREFS Cf. A254298. Sequence in context: A060894 A002228 A199820 * A133141 A231755 A097401 Adjacent sequences:  A255386 A255387 A255388 * A255390 A255391 A255392 KEYWORD nonn,bref AUTHOR Michael P. May, Feb 21 2015 STATUS approved

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Last modified August 11 04:03 EDT 2020. Contains 336421 sequences. (Running on oeis4.)