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Monte Carlo methods for index computation (𝑚𝑜𝑑𝑝)

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Pollard, J. M.·1978·Mathematics of Computation

Abstract

We describe some novel methods to compute the index of any integer relative to a given primitive root of a prime p. Our first method avoids the use of stored tables and apparently requires O ( p 1 / 2 ) O(p^{1/2}) operations. Our second algorithm, which may be regarded as a method of catching kangaroos, is applicable when the index is known to lie in a certain interval; it requires O ( w 1 / 2 ) O(w^{1/2}) operations for an interval of width w , but does not have complete certainty of success. It has several possible areas of application, including the factorization of integers.

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Crossref · 10.1090/s0025-5718-1978-0491431-9

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  • The asymptotically best currently known classical algorithms for computing discrete logarithms in subgroups of this form are generic cycle-finding algorithms, such as Pollard's ρ- and λ-algorithms, that run in time O(√r) and O(√d), respectively, and the general number field sieve (GNFS), that runs in subexponential time in the bit length n of N.

    “The asymptotically best currently known classical algorithms for computing discrete logarithms in subgroups of this form are generic cycle-finding algorithms, such as Pollard's ρ - and λ -algorithms [69], that run in time O ( √ r ) and O ( √ d ) , respectively, and the general number field sieve (GNFS), that runs in subexponential time in the bit length n of N .”

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Research works printed but not linked: 14

  1. D. E. KNUTH, Seminumerical Algorithms, The Art of Computer Programming, Vol. 2, Addison-Wesley, Reading, Mass., 1969. MR 44 #3531.
  2. A. RAPOPORT, "Cycle distributions in random nets," BulL Math. Biophys., v. 10, 1948, pp. 145-157.
  3. B. HARRIS, "Probability distributions related to random mappings," Ann. Math. Statist., v. 31, 1960, pp. 1045-1062.
  4. J. M. POLLARD, "A Monte Carlo method for factorization," BIT, v. 15, 1975, No. 3, pp. 331-335. MR 52 #13611.
  5. R. K. GUY, "How to factor a number," Proc. Fifth Manitoba Conf. on Numerical Math. (Winnipeg, Man., 1975), Univ. of Calgary, Dept. of Math., Statist, and Comp. Sei., Research paper no. 301, Dec. 197 5.
  6. J. S. DEVITT, Aliquot Sequences, M. Sc. Thesis, Dept. of Math, and Stat., Univ. of Calgary, May 1976.
  7. D. E. KNUTH, Sorting and Searching, The Art of Computer Programming, Vol. 3, Addi- son-Wesley, Reading, Mass., 1973.
  8. D. SHANKS, "Class number, a theory of factorization, and genera," Proc. Sympos. Pure Math., vol. 20, Amer. Math. Soc, Providence, R. I., 1970, pp. 415-440. MR 47 #4932.
  9. J. M. POLLARD, "Theorems on factorization and primality testing," Proc Cambridge Philos. Soc, V. 76, 1974, pp. 521-528. MR 50 #6992.
  10. W. DIFFIE & M. E. HELLMAN, "New directions in cryptography," IEEE Trans. Infor- mation Theory, vol. IT-22, No. 6, Nov. 1976, pp. 644-654.
  11. J. C. P. MILLER, "On factorization, with a suggested new approach," Math. Comp., v. 29, 1975, pp. 155-172.
  12. MICHAEL A. MORRISON & JOHN BRILLHART, "A method of factoring and the factorization of F7," Math. Comp., v. 29, 1975, pp. 183-205.
  13. D. H. LEHMER, "An announcement concerning the Delay Line Sieve DLS 127," Math. Comp., v. 20, 1966, pp. 645-646.
  14. D. H. LEHMER & EMMA LEHMER, "A new factorization technique using quadratic forms," Math. Comp., v. 28, 1974, pp. 625-635.

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Authors
Pollard, J. M.
Corresponding author
Pollard, J. M.
Venue
Mathematics of Computation
Published
1978
Volume
32
Issue
143
Pages
918-924
ISSN
  • 0025-5718 (ISSN-L)
  • 1088-6842
OpenAlex
W2019816098
Cited by
825
References
0
Citations by year
2026: 1 · 2025: 7 · 2024: 11 · 2023: 4 · 2022: 11 · 2021: 31 · 2020: 38 · 2019: 24 · 2018: 39 · 2017: 27 · 2016: 34 · 2015: 28 · 2014: 45 · 2013: 32 · 2012: 48
FWCI
7.27
Type
journal article
Language
en
Open access
Locations
Mathematics of Computation (publishedVersion)
Topics
  • Physical Sciences › Computer Science › Information Systems › Cryptography and Residue Arithmetic
  • Physical Sciences › Mathematics › Algebra and Number Theory › Analytic Number Theory Research
  • Physical Sciences › Mathematics › Modeling and Simulation › Mathematical and Computational Methods
Keywords
discrete logarithm problem, index computation, primitive roots, prime modulus, randomized algorithms, integer factorization, modular arithmetic

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