Manual

338 Functions and commands
GCD Returns the greatest common divisor of two or more integers.
gcd(Intgr1, Intgr2,…)
Example:
gcd(32,120,636) returns 4
LCM Returns the lowest common multiple of two or integers.
lcm(Intgr1, Intgr2,…)
Example:
lcm(6,4) returns 12
Prime
Test if Prime Tests whether or not a given integer is a prime number.
isPrime(Integer)
Example:
isPrime(19999) returns false
Nth Prime Returns the nth prime number.
ithprime(Intg(n))
where n is between 1 and 200,000
Example:
ithprime(5) returns 11
Next Prime Returns the next prime or pseudo-prime after an integer.
nextprime(Integer)
Example:
nextprime(11) returns 13
Previous Prime Returns the prime or pseudo-prime number closest to but
smaller than an integer.
prevprime(Integer)
Example:
prevprime(11) returns 7
Euler Compute’s Euler's totient for an integer.
euler(Integer)
Example:
euler(6) returns 2