NAME¶
factor, primes - factor a number, generate large primes
SYNOPSIS¶
factor [
number ]
primes [
start [
finish ] ]
DESCRIPTION¶
Factor prints
number and its prime factors, each repeated the
proper number of times. The number must be positive and less than 2**54 (about
1.8e16)
If no
number is given,
factor reads a stream of numbers from the
standard input and factors them. It exits on any input not a positive integer.
Maximum running time is proportional to sqrt(n).
Primes prints the prime numbers ranging from
start to
finish, where
start and
finish are positive numbers less
than 2**56. If
finish is missing,
primes prints without end; if
start is missing, it reads the starting number from the standard input.
SOURCE¶
/src/cmd/factor.c
/src/cmd/primes.c