run_euler
fib_nonmem
fibmemBigInt
isPrime
primes
prime_divisors
sieve
factors
palindromic_number
palindromic_list
all_divisors, all_divisors2, all_divisors3
collect_list
next_permutation
all_permutations, all_permutations2
num_to_list
nlen
is_pandigital