nextn                  package:base                  R Documentation

Highly Composite Numbers

Description:

     `nextn' returns the smallest integer, greater than or equal to
     `n', which can be obtained as a product of powers of the values
     contained in `factors'. `nextn' is intended to be used to find a
     suitable length to zero-pad the argument of `fft' to so that the
     transform is computed quickly. The default value for `factors'
     ensures this.

Usage:

     nextn(n, factors=c(2,3,5))

Arguments:

       n: an integer.

 factors: a vector of positive integer factors.

See Also:

     `convolve', `fft'.

Examples:

     nextn(1001) # 1024
     table(sapply(599:630, nextn))

