Abstract
Let D = pq be the product of two distinct odd primes. Assuming the parity conjecture, we construct infinitely many r ⩾ 1 such that E 2rD : y 2 = x 3 −2rDx has conjectural rank one and v p (x([k]Q)) ≠ v q (x([k]Q)) for any odd integer k, where Q is the generator of the free part of E(ℚ). Furthermore, under the generalized Riemann hypothesis, the minimal value of r is less than c log4 D for some absolute constant c. As a corollary, one can factor D by computing the generator Q.
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Li, X., Zeng, J. On the elliptic curve y 2 = x 3 −2rDx and factoring integers. Sci. China Math. 57, 719–728 (2014). https://doi.org/10.1007/s11425-014-4769-3
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DOI: https://doi.org/10.1007/s11425-014-4769-3