home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!dtix!darwin.sura.net!wupost!gumby!destroyer!sol.ctr.columbia.edu!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!ucbvax!WATSON.IBM.COM!cliff
- From: cliff@WATSON.IBM.COM ("Cliff Pickover")
- Newsgroups: sci.math
- Subject: Binary Undulants
- Message-ID: <9207242100.AA02394@ucbvax.Berkeley.EDU>
- Date: 24 Jul 92 21:00:16 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Lines: 15
-
- "Binary undulants" are numbers of the form 2**N that undulate
- (alternate) the adjacent digits 1 and 0 in their decimal expansion.
-
- For example, 2**49 is the "highest quality" binary undulant so far
- discovered because it has the undulating sequence 101010 in it:
-
- 2**949 =
- 4758454107128905800953799994079681792420032645310062268978469949811010102913
- Here N = 949 is called an undulation seed of order 6, since it
- gives rise to a 6-digit undulation pattern of adjacent 1's and 0's.
-
- Are undulation seeds of higher order easily found using either
- mathematical prowess or computation power?
-
- Thanks Cliff cliff@watson.ibm.com
-