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Diffstat (limited to 'factor.txi')
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diff --git a/factor.txi b/factor.txi new file mode 100644 index 0000000..8277c2b --- /dev/null +++ b/factor.txi @@ -0,0 +1,73 @@ + + + +@defvar prime:prngs + + @var{prime:prngs} is the random-state (@pxref{Random Numbers}) used by these + procedures. If you call these procedures from more than one thread + (or from interrupt), @code{random} may complain about reentrant + calls. +@end defvar + + + + + + +@defun jacobi-symbol p q + + Returns the value (+1, @minus{}1, or 0) of the Jacobi-Symbol of + exact non-negative integer @var{p} and exact positive odd integer @var{q}. +@end defun + + +@defvar prime:trials + + @var{prime:trials} the maxinum number of iterations of Solovay-Strassen that will + be done to test a number for primality. +@end defvar + + + + +@defun prime? n + + Returns @code{#f} if @var{n} is composite; @code{#t} if @var{n} is prime. + There is a slight chance @code{(expt 2 (- prime:trials))} that a + composite will return @code{#t}. +@end defun + + + +@defun primes< start count + + Returns a list of the first @var{count} prime numbers less than + @var{start}. If there are fewer than @var{count} prime numbers + less than @var{start}, then the returned list will have fewer than + @var{start} elements. +@end defun + + + +@defun primes> start count + + Returns a list of the first @var{count} prime numbers greater than @var{start}. +@end defun + + + + + + + + + + + + +@defun factor k + + Returns a list of the prime factors of @var{k}. The order of the + factors is unspecified. In order to obtain a sorted list do + @code{(sort! (factor @var{k}) <)}. +@end defun |