Posts Tagged ‘ prime factor decomposition ’

bug in schoolmath

June 13, 2010
By
bug in schoolmath

Neil Gunther has pointed out on his blog that the prime number decomposition R package schoolmath contains mistakes in the function primes, listing 1 as a prime number but also including decomposable numbers like 133 in its list of prime numbers: __ primes(100,140) 101 107 111 113 123 129 131 137 __ primes(50,140)  

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schoolmath

March 6, 2010
By
schoolmath

In connection with the Le Monde puzzle of last week, I was looking for an R function that would give me the prime factor decomposition of any integer. Such a function exists within the package schoolmath, developped by Joerg Schlarmann and Josef Wienand. It is called prime.factor and it returns the prime factors of any

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