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- Path: sparky!uunet!dtix!relay!relay2!tecsun1!zogwarg!hoey
- From: hoey@zogwarg.etl.army.mil (Dan Hoey)
- Newsgroups: sci.math
- Subject: Re: Lunde's problem (least number with n divisors)
- Keywords: unique factors
- Message-ID: <1287@zogwarg.etl.army.mil>
- Date: 4 Jan 93 16:49:23 GMT
- References: <1993Jan3.003521.26610@tessi.com> <C0BzI1.MIu@math.uwaterloo.ca>
- Organization: Naval Research Laboratory, Washington, DC
- Lines: 19
-
- shallit@graceland.uwaterloo.ca (Jeffrey Shallit) writes:
-
- >Basically, you're looking for the smallest integer M with n positive
- >*divisors* (although most mathematicians would include 1 and M in the
- >enumeration).
-
- >Beiler also sketches an algorithm that will find such numbers. To
- >the best of my knowledge, it is not known how to produce the prime
- >factorization of the solution in polynomial time (in log n, of
- >course).
-
- If it were, we would have a polynomial-time factoring algorithm, since
- one plus the exponent of 2 is a factor of n, and a proper factor if n
- is composite.
-
- If the prime factorization of n were given as input, would there then
- be a polynomial-time algorithm for this function?
-
- Dan
-