speed test php, python, ruby

Published: 05 March 2012
on channel: MrSuixela

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n! means n * (n-1) * ... * 3 * 2 * 1
For example 10! = 10 * 9 * 8 ... 3*2*1 = 3628800
Let R(n) equal the sum of the digits in the number n!
For example, R(10) = 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27
Find the lowest value for n where R(n) is 8001

Configuration:
Debian squeeze 6.0.3
Kernel Linux 2.6.32
RAM: 4 GB
Processor: Pentium Dual-core E5700 @ 3 GHz

PHP 5.3.3-7+squeeze3
Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48)
ruby 1.8.7 (2010-08-16 patchlevel 302) [x86_64-linux]

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