"""
It can be verified that there are 23 positive integers less than 1000 
that are divisible by at least four distinct primes less than 100

Find how many positive integers less than 10<sup>16</sup> are 
divisible by at least four distinct primes less than 100
"""

def euler268():
    """
    >>> euler268()
    'to-do'
    """
    pass

if __name__ == "__main__":
    import doctest
    doctest.testmod()