One more: 10.0543478 FEI FE-2163 This is 2 * 7 * 19 * 31 * 89 * 137 * .1 Hz. It's quite a collection of primes, but for what reason? (I googled for a prime-number-factoring Java program and used the first one that had a web interface. ) -- --David Forbes, Tucson, AZ http://www.cathodecorner.com/