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 A275739 The set S of primes q satisfying certain conditions (see Müller, 2010 for precise definition). 3
 617, 1723, 2731, 3191, 6547, 11087, 13103, 21683, 21839, 47737, 49727, 49739, 51679, 52361, 60679, 63719, 117721, 133169, 145531, 232681, 275183, 281353, 306431, 341879, 373463, 607319, 700883, 807241, 1212119, 1240559, 1281331, 1292927, 1353239, 1410361, 1602451, 1679599, 2236907 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes q satisfying conditions (18) and (19) on page 1179 of Müller, 2010. The values are given in section 3.2.2 on page 1179. Let E be the elliptic curve y^2 = x^3 - 3500*x - 98000, and P the point (84, 448) on E. Then these are exactly the primes q satisfying the following four conditions: (i) there exists a point Q in E(F_q) such that 2*Q = P in E(F_q), (ii) the 2-adic valuation of the order of P in E(F_q) equals 1, (iii) there exists a point of order 4 in E(F_q), (iv) the order of P in E(F_q) divides 17272710. Here, E(F_q) denotes the reduction of the elliptic curve E over the finite field of order q. - Robin Visser, Aug 16 2023 LINKS Table of n, a(n) for n=1..37. S. Müller, On the existence and non-existence of elliptic pseudoprimes, Mathematics of Computation, Vol. 79, No. 270 (2010), 1171-1190. PROG (Sage) for q in range(11, 100000): if Integer(q).is_prime(): E = EllipticCurve(GF(q), [-3500, -98000]) P, od = E(84, 448), E(84, 448).order() if ((17272710%od == 0) and (od.valuation(2) == 1) and (E.abelian_group().exponent()%4 == 0)): for Q in E: if (2*Q == P): print(q) break # Robin Visser, Aug 16 2023 CROSSREFS Sequence in context: A221503 A275048 A350083 * A108818 A288412 A234559 Adjacent sequences: A275736 A275737 A275738 * A275740 A275741 A275742 KEYWORD nonn AUTHOR Felix Fröhlich, Aug 07 2016 EXTENSIONS More terms from Robin Visser, Aug 16 2023 STATUS approved

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Last modified April 13 23:25 EDT 2024. Contains 371652 sequences. (Running on oeis4.)