Wednesday, September 14, 2005

Square phone numbers

10-digit numbers that are also perfect squares, cubes, etc. (prime powers). For example, there are only 5 phone numbers that are perfect 7th powers of integers:

249-435-7888

340-482-5447

458-647-1424

610-351-5625

803-181-0176 (Are prefixes allowed to start with 1? This one might be eliminated.)

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