| cancel.fraction | cancel a fraction to the smallest numbers |
| decimal2fraction | convert a decimal-number into fraction |
| gcd | Greatest common divisor of two numbers |
| is.prim | Check whether a vector contains prime numbers |
| prime.factor | This function calculates the prime-factors of a number |
| primes | generate prime-numbers in a range from START to END |
| primlist | A vector containing primes between 1 and 99,999,999 |
| scm | calculating the smallest common multiple of two numbers |