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- Path: sparky!uunet!ogicse!uwm.edu!psuvax1!fortran.cs.psu.edu!so
- From: so@fortran.cs.psu.edu (Nicol C. So)
- Newsgroups: sci.crypt
- Subject: Re: New record non-networked factorization of difficult number
- Message-ID: <BrwFFH.CAt@cs.psu.edu>
- Date: 24 Jul 92 15:09:17 GMT
- Article-I.D.: cs.BrwFFH.CAt
- References: <26250.Jul2400.28.0492@virtualnews.nyu.edu>
- Sender: news@cs.psu.edu (Usenet)
- Organization: Penn State Computer Science
- Lines: 13
- Nntp-Posting-Host: fortran.cs.psu.edu
-
- In article <26250.Jul2400.28.0492@virtualnews.nyu.edu> brnstnd@nyu.edu (Dan Bernstein) writes:
- >Arjen Lenstra and I are pleased to announce the record non-networked
- >factorization of a difficult number (no prime factors under 40 digits).
- >The number is (2^488 + 1)/257. Its prime factors are p_49 and p_97,
- >...
- >This computation can be seen as a substantial step towards a practical
- >implementation of the general number field sieve (GNFS): it depended on
- >character columns and a square root inside the algebraic number field
- >rather than explicit generators of the unit group and of prime ideals of
- >the field. We are investigating the practical effectiveness of GNFS.
-
- Question: is the technique used here generally applicable to all
- composite numbers or is it applicable to composites of special forms?
-